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🐘 Packagist

GHSA-9j5w-2cqc-cwj9

HIGH

Magento LTS vulnerable to Stored XSS via TinyMCE WYSIWYG Editor

Published
Dec 8, 2023
Updated
Dec 4, 2024
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐘openmage/magento-lts

Real-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

From HackerOne report #1948040 by Halit AKAYDIN (hltakydn)

Impact

What kind of vulnerability is it? Who is impacted?

The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags.

Patches

Has the problem been patched? What versions should users upgrade to?

This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

The WYSIWYG editor features could be disabled in the configuration. Possibly some WAF appliances would filter this attack.

References

Are there any links users can visit to find out more?

The attack is simply an exploit of the "onmouseover" attribute of an img element as described on OWASP XSS Filter Evasion

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistopenmage/magento-ltsall versions20.2.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openmage/magento-lts. 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.

  2. Fix

    Update openmage/magento-lts to 20.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9j5w-2cqc-cwj9 is resolved across your whole dependency graph.

  3. 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.

  4. How O3 protects you

    O3 pinpoints whether GHSA-9j5w-2cqc-cwj9 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-9j5w-2cqc-cwj9. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

From HackerOne report [#1948040](https://hackerone.com/reports/1948040) by Halit AKAYDIN (hltakydn) ### Impact _What kind of vulnerability is it? Who is impacted?_ The TinyMCE WYSIWYG editor fails to filter scripts when rendering the HTML in specially crafted HTML tags. ### Patches _Has the problem been patched? What versions should users upgrade to?_ This vulnerability was fixed in version 20.2.0 by upgrading TinyMCE to a recent version in https://github.com/OpenMage/magento-lts/pull/3220 ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_
O3 Security · Impact-Aware SCA

Is GHSA-9j5w-2cqc-cwj9 in your dependencies?

O3 detects GHSA-9j5w-2cqc-cwj9 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.