vulnerability / NVI-00008285 / Revision 3
CI4MS has stored XSS via srcdoc attribute bypass in Google Maps iframe setting
OSV carries this publisher advisory for ci4-cms-erp/ci4ms. This is an aggregated source copy; consult the original publisher and compare update dates.
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.
0.235%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.14561. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
ci4-cms-erp/ci4ms
source listedECOSYSTEM: introduced 0; fixed 0.31.4.0
## Summary The Google Maps iframe setting (`cMap` field) in `compInfosPost()` sanitizes input using `strip_tags()` with an `` allowlist and regex-based removal of `on\w+` event handlers. However, the `srcdoc` attribute is not an event handler and passes all filters. An attacker with admin settings access can inject an `` payload with HTML-entity-encoded JavaScript that executes in the context of the parent page when rendered to unauthenticated frontend visitors. ## Details **Input sanitization** (`modules/Settings/Controllers/Settings.php:49-53`): ```php $mapValue = trim(strip_tags($this->request->getPost('cMap'), '')); $mapValue = preg_replace('/\bon\w+\s*=\s*"[^"]*"/i', '', $mapValue); $mapValue = preg_replace('/\bon\w+\s*=\s*\'[^\']*\'/i', '', $mapValue); $mapValue = preg_replace('/\bon\w+\s*=\s*[^\s>]+/i', '', $mapValue); setting()->set('Gmap.map_iframe', $mapValue); ``` The three regex patterns only match attributes beginning with `on` (e.g., `onclick`, `onerror`). The `srcdoc` attribute does not begin with `on` and passes through untouched. **Output rendering** (`app/Views/templates/default/gmapiframe.php:3`): ```php <?php echo stri
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 0.31.4.0 for ci4-cms-erp/ci4ms. 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
- 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. FIRST EPSS
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.
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-x3hr-cp7x-44r2 ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-39390 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 3 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 2 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.