GHSA-qm2q-9f3q-2vcv
MEDIUMTrix has a cross-site Scripting vulnerability on copy & paste
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
Blast Radius
trixReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.
Description
The Trix editor, versions prior to 2.1.4, is vulnerable to XSS when pasting malicious code. This vulnerability is a bypass of the fix put in place for https://github.com/basecamp/trix/security/advisories/GHSA-qjqp-xr96-cj99. In https://github.com/basecamp/trix/pull/1149, we added sanitation for Trix attachments with a text/html content type. However, Trix only checks the content type on the paste event's dataTransfer object. As long as the dataTransfer has a content type of text/html, Trix parses its contents and creates an Attachment with them, even if the attachment itself doesn't have a text/html content type. Trix then uses the attachment content to set the attachment element's innerHTML.
Impact
An attacker could trick a user to copy and paste malicious code that would execute arbitrary JavaScript code within the context of the user's session, potentially leading to unauthorized actions being performed or sensitive information being disclosed.
Patches
Update Recommendation: Users should upgrade to Trix editor version 2.1.4 or later, which incorporates proper sanitization of input from copied content.
Workarounds
This is not really a workaround but something that should be considered in addition to upgrading to the patched version. If affected users can disallow browsers that don't support a Content Security Policy, then this would be an effective workaround for this and all XSS vulnerabilities. Set CSP policies such as script-src 'self' to ensure that only scripts hosted on the same origin are executed, and explicitly prohibit inline scripts using script-src-elem.
References
- https://github.com/basecamp/trix/pull/1156
- https://github.com/basecamp/trix/releases/tag/v2.1.4
- https://github.com/basecamp/trix/pull/1149
- https://github.com/basecamp/trix/security/advisories/GHSA-qjqp-xr96-cj99
- MDN docs for
DataTransfer
Credits
This vulnerability was reported by HackerOne researcher thwin_htet.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | trix | all versions | 2.1.4 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for trix. 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 trix to 2.1.4 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-qm2q-9f3q-2vcv 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-qm2q-9f3q-2vcv 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-qm2q-9f3q-2vcv. 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-qm2q-9f3q-2vcv in your dependencies?
O3 detects GHSA-qm2q-9f3q-2vcv across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.