Summary
eZ Platform Admin UI vulnerable to DOM-based Cross-site Scripting in file upload widget
Workarounds
None.
References
- https://developers.ibexa.co/security-advisories/ibexa-sa-2024-004-dom-based-xss-in-file-upload
- https://github.com/ezsystems/ezplatform-admin-ui/commit/7a9f991b200fa5a03d49cd07f50577c8bc90a30b
- https://github.com/ibexa/admin-ui/security/advisories/GHSA-qm44-wjm2-pr59
Credit
This vulnerability was discovered and reported to Ibexa by Alec Romano: https://github.com/4rdr
We thank them for reporting it responsibly to us.
How to report security issues:
https://doc.ibexa.co/en/latest/infrastructure_and_maintenance/security/reporting_issues/
Impact
The file upload widget is vulnerable to XSS payloads in filenames. Access permission to upload files is required. As such, in most cases only authenticated editors and administrators will have the required permission. It is not persistent, i.e. the payload is only executed during the upload. In effect, an attacker will have to trick an editor/administrator into uploading a strangely named file. The fix ensures XSS is escaped.
Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.
GHSA-GC5H-6JX9-Q2QH has a CVSS score of 5.4 (Medium). The vector is network-reachable, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (3.3.39); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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See "Patched versions". Commit: https://github.com/ezsystems/ezplatform-admin-ui/commit/7a9f991b200fa5a03d49cd07f50577c8bc90a30b
Frequently Asked Questions
- What is GHSA-GC5H-6JX9-Q2QH? GHSA-GC5H-6JX9-Q2QH is a medium-severity cross-site scripting (XSS) vulnerability in ezsystems/ezplatform-admin-ui (composer), affecting versions >= 3.3.0, < 3.3.39. It is fixed in 3.3.39. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
- How severe is GHSA-GC5H-6JX9-Q2QH? GHSA-GC5H-6JX9-Q2QH has a CVSS score of 5.4 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of ezsystems/ezplatform-admin-ui are affected by GHSA-GC5H-6JX9-Q2QH? ezsystems/ezplatform-admin-ui (composer) versions >= 3.3.0, < 3.3.39 is affected.
- Is there a fix for GHSA-GC5H-6JX9-Q2QH? Yes. GHSA-GC5H-6JX9-Q2QH is fixed in 3.3.39. Upgrade to this version or later.
- Is GHSA-GC5H-6JX9-Q2QH exploitable, and should I be worried? Whether GHSA-GC5H-6JX9-Q2QH is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-GC5H-6JX9-Q2QH is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-GC5H-6JX9-Q2QH? Upgrade
ezsystems/ezplatform-admin-uito 3.3.39 or later.