How severe is GHSA-2v3v-3whp-953h?

GHSA-2v3v-3whp-953h has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-2v3v-3whp-953h?

GHSA-2v3v-3whp-953h affects the following packages: starcitizentools/citizen-skin (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-2v3v-3whp-953h?

Update starcitizentools/citizen-skin to 3.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2v3v-3whp-953h is resolved across your whole dependency graph.

How do I detect GHSA-2v3v-3whp-953h in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for starcitizentools/citizen-skin. 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.

How do I mitigate GHSA-2v3v-3whp-953h if there is no patch (or I can't update yet)?

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 does O3 Security protect against GHSA-2v3v-3whp-953h?

O3 pinpoints whether GHSA-2v3v-3whp-953h is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Is GHSA-2v3v-3whp-953h actively exploited in the wild?

No public exploit code has been indexed for GHSA-2v3v-3whp-953h 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.

What is the EPSS score for GHSA-2v3v-3whp-953h?

GHSA-2v3v-3whp-953h has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 27th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

When was GHSA-2v3v-3whp-953h published, and has it been updated?

GHSA-2v3v-3whp-953h was published on June 13, 2025 and was last updated on June 13, 2025. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

GHSA-2v3v-3whp-953h

MEDIUM

starcitizentools/citizen-skin allows stored XSS in user registration date message

Also known asCVE-2025-49578

Published

Jun 13, 2025

Updated

Jun 13, 2025

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk27th percentile+0.19%

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

1 pkg affected

🐘starcitizentools/citizen-skin

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

Summary

Various date messages returned by Language::userDate are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM.

Details

The result of $this->lang->userDate( $timestamp, $this->user ) returns unescaped values, but is inserted as raw HTML by Citizen: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/includes/Components/CitizenComponentUserInfo.php#L55-L60

PoC

Go to any page using citizen with the uselang parameter set to x-xss and while being logged in Depending on the registration date of the account you're logged in with, various messages can be shown. In my case, it's november:

Impact

This impacts wikis where a group has the editinterface but not the editsitejs user right.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`starcitizentools/citizen-skin`	≥ 3.3.0&&< 3.3.1	3.3.1

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for starcitizentools/citizen-skin. 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 starcitizentools/citizen-skin to 3.3.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2v3v-3whp-953h 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-2v3v-3whp-953h 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-2v3v-3whp-953h. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Summary Various date messages returned by `Language::userDate` are inserted into raw HTML, allowing anybody who can edit those messages to insert arbitrary HTML into the DOM. ### Details The result of `$this->lang->userDate( $timestamp, $this->user )` returns unescaped values, but is inserted as raw HTML by Citizen: https://github.com/StarCitizenTools/mediawiki-skins-Citizen/blob/072e4365e9084e4b153eac62d3666566c06f5a49/includes/Components/CitizenComponentUserInfo.php#L55-L60 ### PoC 1. Go to any page using citizen with the uselang parameter set to x-xss and while being logged in Dependi

O3 Security · Impact-Aware SCA

Is GHSA-2v3v-3whp-953h in your dependencies?

O3 detects GHSA-2v3v-3whp-953h across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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