How severe is GHSA-jxcx-3h54-qqxx?

No CVSS score has been assigned to GHSA-jxcx-3h54-qqxx yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-jxcx-3h54-qqxx?

GHSA-jxcx-3h54-qqxx affects the following packages: silverstripe/admin (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-jxcx-3h54-qqxx?

Update silverstripe/admin to 1.13.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jxcx-3h54-qqxx is resolved across your whole dependency graph.

How do I detect GHSA-jxcx-3h54-qqxx in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for silverstripe/admin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-jxcx-3h54-qqxx if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is GHSA-jxcx-3h54-qqxx actively exploited in the wild?

No public exploit code has been indexed for GHSA-jxcx-3h54-qqxx yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-jxcx-3h54-qqxx published, and has it been updated?

GHSA-jxcx-3h54-qqxx was published on August 23, 2023 and was last updated on November 29, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

SilverStripe CMS Cross-site Scripting vulnerabilities inherited from TinyMCEGHSA-jxcx-3h54-qqxx

GHSA-jxcx-3h54-qqxx is a security vulnerability in silverstripe/admin. A fix is available for silverstripe/admin — see the affected versions and patch details below.

Published

Aug 23, 2023

Updated

Nov 29, 2024

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 29, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

🐘silverstripe/admin

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

TinyMCE 4.x is vulnerable to several XSS vectors, which had been patched in later versions. Two of these have been identified as affecting silverstripe/admin.

Only Silverstripe CMS 4 is affected by these vulnerabilities. It's not possible to upgrade Silverstripe CMS 4 to use a more recent release of TinyMCE without introducing breaking changes. Instead, the security patches that shipped in later releases of TinyMCE have been backported to the TinyMCE version bundled in silverstripe/admin.

Silverstripe CMS 5 is not affected by these vulnerabilities because it uses TinyMCE 6.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`silverstripe/admin`	≥ 1.0.0&&< 1.13.6	1.13.6`composer require silverstripe/admin:^1.13.6`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for silverstripe/admin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update silverstripe/admin to 1.13.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jxcx-3h54-qqxx is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

TinyMCE 4.x is vulnerable to several XSS vectors, which had been patched in later versions. Two of these have been identified as affecting silverstripe/admin. Only Silverstripe CMS 4 is affected by these vulnerabilities. It's not possible to upgrade Silverstripe CMS 4 to use a more recent release of TinyMCE without introducing breaking changes. Instead, the security patches that shipped in later releases of TinyMCE have been backported to the TinyMCE version bundled in silverstripe/admin. Silverstripe CMS 5 is not affected by these vulnerabilities because it uses TinyMCE 6.

O3 Security · Impact-Aware SCA

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