{"items":[{"id":"NVI-00005053","kind":"vulnerability","title":"Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-vhm8-wwrf-3gcw","CVE-2023-27577"],"plain_summary":"OSV carries this publisher advisory for flarum/core. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 1.7.0 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-07047010f01afa2f73e964e56c623d72"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-17T05:45:30.320Z","value":"6.6 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-bd7d6422d994605c778d63ba650e4ef9"},{"kind":"CVSS","as_of":"2026-06-17T05:45:30.320Z","value":"4.9 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-bd7d6422d994605c778d63ba650e4ef9"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.851%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.58318. Missing scores are unknown.","source_id":"sr-07047010f01afa2f73e964e56c623d72"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-7efe5aaf440b2ff286f2520093a83eb2","url":"https://github.com/advisories/GHSA-vhm8-wwrf-3gcw","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vhm8-wwrf-3gcw","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.375Z"},{"id":"sr-bd7d6422d994605c778d63ba650e4ef9","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-27577","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2023-27577","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T00:58:29.087Z"},{"id":"sr-07047010f01afa2f73e964e56c623d72","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-27577","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:57:29.219Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"### Impact\nIf an admin account has already been compromised by an attacker, the `LESS` parser can be exploited to read sensitive files on the server through the use of path traversal techniques.\n\nAn attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the following code to read the contents of the `/etc/passwd` file:\n\n```less\n@import (inline) '/etc/passwd';\n\n.test {\n  content: data-uri('/etc/passwd');\n}\n```\n\n### Patches\nThe vulnerability has been addressed in version `1.7`. Users should upgrade to this version to mitigate the vulnerability.\n\n### Workarounds\nUsers can mitigate the vulnerability by ensuring that their admin accounts are secured with strong passwords and other best practices for account security. Additionally, users can limit the exposure of sensitive files on the server by implementing appropriate file permissions and access controls.\n","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.7.0"]}],"null_published_at":"2026-11-07T22:29:23.377Z","source_updated_at":"2026-09-10T03:49:56.864Z","source_disclosed_at":"2023-03-13T20:52:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:41.375Z"},{"id":"NVI-00005053","kind":"vulnerability","title":"Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vhm8-wwrf-3gcw","CVE-2023-27577"],"plain_summary":"OSV carries this publisher advisory for flarum/core. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 1.7.0 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-07047010f01afa2f73e964e56c623d72"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.851%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.58318. Missing scores are unknown.","source_id":"sr-07047010f01afa2f73e964e56c623d72"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-7efe5aaf440b2ff286f2520093a83eb2","url":"https://github.com/advisories/GHSA-vhm8-wwrf-3gcw","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vhm8-wwrf-3gcw","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.375Z"},{"id":"sr-07047010f01afa2f73e964e56c623d72","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-27577","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:57:29.219Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"### Impact\nIf an admin account has already been compromised by an attacker, the `LESS` parser can be exploited to read sensitive files on the server through the use of path traversal techniques.\n\nAn attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the following code to read the contents of the `/etc/passwd` file:\n\n```less\n@import (inline) '/etc/passwd';\n\n.test {\n  content: data-uri('/etc/passwd');\n}\n```\n\n### Patches\nThe vulnerability has been addressed in version `1.7`. Users should upgrade to this version to mitigate the vulnerability.\n\n### Workarounds\nUsers can mitigate the vulnerability by ensuring that their admin accounts are secured with strong passwords and other best practices for account security. Additionally, users can limit the exposure of sensitive files on the server by implementing appropriate file permissions and access controls.\n","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.7.0"]}],"null_published_at":"2026-11-06T07:24:11.270Z","source_updated_at":"2026-09-10T03:49:56.864Z","source_disclosed_at":"2023-03-13T20:52:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:41.375Z"},{"id":"NVI-00005053","kind":"vulnerability","title":"Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vhm8-wwrf-3gcw","CVE-2023-27577"],"plain_summary":"OSV carries this publisher advisory for flarum/core. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 1.7.0 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-4369aad9961a6042f023903ef6cd6e04"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.851%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.58215. Missing scores are unknown.","source_id":"sr-4369aad9961a6042f023903ef6cd6e04"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-7efe5aaf440b2ff286f2520093a83eb2","url":"https://github.com/advisories/GHSA-vhm8-wwrf-3gcw","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vhm8-wwrf-3gcw","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.375Z"},{"id":"sr-4369aad9961a6042f023903ef6cd6e04","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2023-27577","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:03.704Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"### Impact\nIf an admin account has already been compromised by an attacker, the `LESS` parser can be exploited to read sensitive files on the server through the use of path traversal techniques.\n\nAn attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the following code to read the contents of the `/etc/passwd` file:\n\n```less\n@import (inline) '/etc/passwd';\n\n.test {\n  content: data-uri('/etc/passwd');\n}\n```\n\n### Patches\nThe vulnerability has been addressed in version `1.7`. Users should upgrade to this version to mitigate the vulnerability.\n\n### Workarounds\nUsers can mitigate the vulnerability by ensuring that their admin accounts are secured with strong passwords and other best practices for account security. Additionally, users can limit the exposure of sensitive files on the server by implementing appropriate file permissions and access controls.\n","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.7.0"]}],"null_published_at":"2026-10-31T23:18:17.226Z","source_updated_at":"2026-09-10T03:49:56.864Z","source_disclosed_at":"2023-03-13T20:52:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:42:41.375Z"},{"id":"NVI-00005053","kind":"vulnerability","title":"Path Traversal Vulnerability in `LESS` Parser allows reading of sensitive server files","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-vhm8-wwrf-3gcw","CVE-2023-27577"],"plain_summary":"OSV carries this publisher advisory for flarum/core. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 1.7.0 for flarum/core. Confirm the publisher’s latest guidance.","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-7efe5aaf440b2ff286f2520093a83eb2","url":"https://github.com/advisories/GHSA-vhm8-wwrf-3gcw","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-vhm8-wwrf-3gcw","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:41.375Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-7efe5aaf440b2ff286f2520093a83eb2"],"technology":"flarum/core","known_exclusions":[],"conditions_summary":"### Impact\nIf an admin account has already been compromised by an attacker, the `LESS` parser can be exploited to read sensitive files on the server through the use of path traversal techniques.\n\nAn attacker can achieve this by providing an absolute path to a sensitive file in the custom `LESS` setting, which the `LESS` parser will then read. For example, an attacker could use the following code to read the contents of the `/etc/passwd` file:\n\n```less\n@import (inline) '/etc/passwd';\n\n.test {\n  content: data-uri('/etc/passwd');\n}\n```\n\n### Patches\nThe vulnerability has been addressed in version `1.7`. Users should upgrade to this version to mitigate the vulnerability.\n\n### Workarounds\nUsers can mitigate the vulnerability by ensuring that their admin accounts are secured with strong passwords and other best practices for account security. Additionally, users can limit the exposure of sensitive files on the server by implementing appropriate file permissions and access controls.\n","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 1.7.0"]}],"null_published_at":"2026-10-31T22:13:01.438Z","source_updated_at":"2026-09-10T03:49:56.864Z","source_disclosed_at":"2023-03-13T20:52:11.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:42:41.375Z"}],"next_cursor":null,"snapshot_revision":"42594"}