GHSA-8c85-4rr5-chr4 — ezsystems/demobundle
GHSA-8c85-4rr5-chr4 is a security vulnerability in ezsystems/demobundle. A fix is available for ezsystems/demobundle — see the affected versions and patch details below.
Cross-site Scripting (XSS) in DemoBundle/ezdemo bundled VideoJS
Real-World Exposure
ezsystems/demobundleReal-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 is about a vulnerability in VideoJS, which is bundled in DemoBundle and the ezdemo legacy extension. Older releases of VideoJS contain an XSS vulnerability in the Flash-based video player. This is bundled in DemoBundle, and in the Legacy "ezdemo" and "ezdemo-ls-extension" extensions. Among the branches still receiving security advisories, only eZ Publish Platform 5.4 and eZ Publish Legacy 5.4 are affected. However, it may be possible to make this software work in newer branches, so please check whether you have it installed even if you're using eZ Platform 1.x or 2.x.
Because DemoBundle / ezdemo are only intended for demo purposes, they are not supported software. For that reason, and given the old age of the software, and manpower issues during the Coronavirus crisis, we are taking the unusual step of simply removing the affected file. This resolves the vulnerability, but also breaks the video playback feature. It may be possible to make it work again by upgrading to a current version of VideoJS, but it is unlikely that we will do this, given the reasons already mentioned.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | ezsystems/demobundle | ≥ 5.4.0&&< 5.4.6.1 | 5.4.6.1composer require ezsystems/demobundle:^5.4.6.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ezsystems/demobundle, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update ezsystems/demobundle to 5.4.6.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-8c85-4rr5-chr4 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-8c85-4rr5-chr4 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-8c85-4rr5-chr4. 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-8c85-4rr5-chr4 in your dependencies?
O3 Security finds GHSA-8c85-4rr5-chr4 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.