GHSA-2vh3-cj9j-mcj5
eZ Publish Legacy Cross-site Scripting (XSS) in 'disabled module' error template
Blast Radius
ezsystems/ezpublish-legacy🐘ezsystems/ezpublish-legacy🐘ezsystems/ezpublish-legacy🐘ezsystems/ezpublish-legacy🐘ezsystems/ezpublish-legacyReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
This security advisory fixes a vulnerability in eZ Publish Legacy, and we recommend that you install it as soon as possible if you are using Legacy via the LegacyBridge.
Installations where all modules are disabled may be vulnerable to XSS injection in the module name. This is a rare configuration, but we still recommend installing the update, which adds the necessary input washing.
To install, use Composer to update to one of the "Resolving versions" mentioned above, or apply this patch manually: https://github.com/ezsystems/ezpublish-legacy/commit/4697bff700e8cf95d5847ea19dad3479a77b02d9
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | ezsystems/ezpublish-legacy | ≥ 2018.9.0&&< 2018.9.1.2 | 2018.9.1.2 |
| 🐘Packagist | ezsystems/ezpublish-legacy | ≥ 2018.6.0&&< 2018.6.1.3 | 2018.6.1.3 |
| 🐘Packagist | ezsystems/ezpublish-legacy | ≥ 2011.0.0&&< 2017.12.4.2 | 2017.12.4.2 |
| 🐘Packagist | ezsystems/ezpublish-legacy | ≥ 5.4.0&&< 5.4.12.2 | 5.4.12.2 |
| 🐘Packagist | ezsystems/ezpublish-legacy | ≥ 5.3.0&&< 5.3.12.5 | 5.3.12.5 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ezsystems/ezpublish-legacy. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update ezsystems/ezpublish-legacy to 2018.9.1.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2vh3-cj9j-mcj5 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-2vh3-cj9j-mcj5 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-2vh3-cj9j-mcj5. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-2vh3-cj9j-mcj5 in your dependencies?
O3 detects GHSA-2vh3-cj9j-mcj5 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.