How severe is GHSA-3374-7h99-xr85?

GHSA-3374-7h99-xr85 has a CVSS score of 5.4/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by GHSA-3374-7h99-xr85?

GHSA-3374-7h99-xr85 affects the following packages: forkcms/forkcms (Packagist). Ecosystems affected: Packagist.

How do I fix GHSA-3374-7h99-xr85?

Update forkcms/forkcms to 5.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3374-7h99-xr85 is resolved across your whole dependency graph.

How do I detect GHSA-3374-7h99-xr85 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for forkcms/forkcms. 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-3374-7h99-xr85 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-3374-7h99-xr85?

O3 pinpoints whether GHSA-3374-7h99-xr85 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-3374-7h99-xr85 actively exploited in the wild?

Yes. There are 1 known exploit references for GHSA-3374-7h99-xr85, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-3374-7h99-xr85?

GHSA-3374-7h99-xr85 has an EPSS (Exploit Prediction Scoring System) score of 0.6%, placing it in the 43th 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.

What type of vulnerability is GHSA-3374-7h99-xr85?

GHSA-3374-7h99-xr85 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was GHSA-3374-7h99-xr85 published, and has it been updated?

GHSA-3374-7h99-xr85 was published on October 25, 2021 and was last updated on November 8, 2023. 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-3374-7h99-xr85

MEDIUM

Cross-site scripting in forkcms

Also known asCVE-2020-23049

Published

Oct 25, 2021

Updated

Nov 8, 2023

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

0.6%probability of exploitation in next 30 days

Lower Risk43th percentile+0.30%

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

🐘forkcms/forkcms

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

Fork CMS Content Management System v5.8.0 was discovered to contain a cross-site scripting (XSS) vulnerability in the Displayname field when using the Add, Edit or `Register' functions. This vulnerability allows attackers to execute arbitrary web scripts or HTML.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`forkcms/forkcms`	all versions	5.8.1

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Fork CMS Content Management System v5.8.0 was discovered to contain a cr…

vulnerability-lab.comNVDOct 2021

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for forkcms/forkcms. 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 forkcms/forkcms to 5.8.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3374-7h99-xr85 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-3374-7h99-xr85 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-3374-7h99-xr85. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

Fork CMS Content Management System v5.8.0 was discovered to contain a cross-site scripting (XSS) vulnerability in the `Displayname` field when using the `Add`, `Edit` or `Register' functions. This vulnerability allows attackers to execute arbitrary web scripts or HTML.

O3 Security · Impact-Aware SCA

Is GHSA-3374-7h99-xr85 in your dependencies?

O3 detects GHSA-3374-7h99-xr85 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my dependencies How O3 SCA works