vulnerability / NVI-00006758 / Revision 3
Contao: Server-Side Request Forgery (SSRF) via Unvalidated RSS Feed URL in Feed Reader Module
GitHub lists this reviewed advisory for contao/contao, contao/contao, contao/core-bundle, contao/core-bundle. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
3.1 low
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
3.1 LOW (3.1)
security-advisories@github.com severity; no combined Null risk score.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
contao/contao
source listed>= 5.3.35, < 5.3.48
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/contao
source listed>= 5.4.0, < 5.7.9
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/core-bundle
source listed>= 5.3.35, < 5.3.48
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/core-bundle
source listed>= 5.4.0, < 5.7.9
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/contao
source listedECOSYSTEM: introduced 5.3.35; fixed 5.3.48
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/contao
source listedECOSYSTEM: introduced 5.4.0; fixed 5.7.9
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/core-bundle
source listedECOSYSTEM: introduced 5.3.35; fixed 5.3.48
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
contao/core-bundle
source listedECOSYSTEM: introduced 5.4.0; fixed 5.7.9
### Summary The Feed Reader front-end module passes RSS feed URLs from its configuration directly to `$this->feedIo->read($url)` without any scheme validation or private-IP blocklist. A backend user with module-edit permissions can configure an arbitrary URL pointing to internal network services, cloud-provider metadata endpoints, or loopback addresses, causing the server to fetch those resources unconditionally. Confirmed live: the server successfully reaches the internal MySQL database container and its own loopback Apache instance. --- ### Details In `core-bundle/src/Controller/FrontendModule/FeedReaderController.php`, the `getResponse()` function iterates over the configured feed URLs and passes each one directly to the HTTP client with no validation: ```php // Line 50-55 foreach (StringUtil::trimsplit('[\n\t ]', trim($model->rss_feed)) as $url) { try { $feed = $this->cache->get( 'feed_reader_'.$model->id.'_'.md5($url), function (ItemInterface $item) use ($url, $model) { $readerResult = $this->feedIo->read($url, new Feed()); // <-- no validation ``` The DCA field definition for `rss_feed` in `tl_module.php` carries no UR
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. NIST National Vulnerability Database
- vendor patch
The original advisory lists fixed boundaries 5.3.48 for contao/contao. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 5.7.9 for contao/contao. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 5.3.48 for contao/core-bundle. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 5.7.9 for contao/core-bundle. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-87mg-5grr-rhwh ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
- GHSA-87mg-5grr-rhwh ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-57232 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 3 ·
Source facts changed; compare the preserved prior revision.
- Revision 2 ·
Source facts changed; compare the preserved prior revision.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.