How severe is GHSA-fxmx-pfm2-85m2?

No CVSS score has been assigned to GHSA-fxmx-pfm2-85m2 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-fxmx-pfm2-85m2?

GHSA-fxmx-pfm2-85m2 affects the following packages: codechecker (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-fxmx-pfm2-85m2?

Update codechecker to 6.18.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fxmx-pfm2-85m2 is resolved across your whole dependency graph.

How do I detect GHSA-fxmx-pfm2-85m2 in my PyPI dependencies?

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

How do I mitigate GHSA-fxmx-pfm2-85m2 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-fxmx-pfm2-85m2 actively exploited in the wild?

Yes. There are 1 known exploit references for GHSA-fxmx-pfm2-85m2, 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-fxmx-pfm2-85m2?

GHSA-fxmx-pfm2-85m2 has an EPSS (Exploit Prediction Scoring System) score of 1.6%, placing it in the 77th 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-fxmx-pfm2-85m2?

GHSA-fxmx-pfm2-85m2 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-fxmx-pfm2-85m2 published, and has it been updated?

GHSA-fxmx-pfm2-85m2 was published on January 21, 2022 and was last updated on July 6, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

Cross-site Scripting in Ericsson CodeCheckerGHSA-fxmx-pfm2-85m2

Fix: Ericsson/codechecker#3549

GHSA-fxmx-pfm2-85m2 is a Cross-site Scripting (XSS) vulnerability in codechecker. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for codechecker — see the affected versions and patch details below.

Also known asCVE-2021-44217PYSEC-2022-43181PYSEC-2026-625

Published

Jan 21, 2022

Updated

Jul 6, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

1.6%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs77th percentile — riskier than 77% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐍codechecker

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

In Ericsson CodeChecker prior to 6.18.2, a Stored Cross-site scripting (XSS) vulnerability in the comments component of the reports viewer allows remote attackers to inject arbitrary web script or HTML via the POST JSON data of the /CodeCheckerService API.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`codechecker`	all versions	6.18.2`pip install --upgrade 'codechecker==6.18.2'`

Affected Products

1 product · 1 configurations

Application

codecheckerericsson

≤ 6.18.0

range

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.

In Ericsson CodeChecker through 6.18.0, a Stored Cross-site scripting (X…

github.comNVDJan 2022

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for codechecker, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update codechecker to 6.18.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fxmx-pfm2-85m2 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

O3 Security · Impact-Aware SCA

Is GHSA-fxmx-pfm2-85m2 in your dependencies?

Find it across PyPI, including transitive dependencies.

Scan my dependencies How O3 SCA works