How severe is GHSA-fc72-v54c-x9jg?

GHSA-fc72-v54c-x9jg 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-fc72-v54c-x9jg?

GHSA-fc72-v54c-x9jg affects the following packages: moin (PyPI), moin (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-fc72-v54c-x9jg?

Update moin to 1.9.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fc72-v54c-x9jg is resolved across your whole dependency graph.

How do I detect GHSA-fc72-v54c-x9jg in my PyPI dependencies?

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

How do I mitigate GHSA-fc72-v54c-x9jg 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-fc72-v54c-x9jg actively exploited in the wild?

Yes. There are 3 known exploit references for GHSA-fc72-v54c-x9jg, including 3 in-the-wild exploitations 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-fc72-v54c-x9jg?

GHSA-fc72-v54c-x9jg has an EPSS (Exploit Prediction Scoring System) score of 2.3%, placing it in the 83th 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-fc72-v54c-x9jg?

GHSA-fc72-v54c-x9jg 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-fc72-v54c-x9jg published, and has it been updated?

GHSA-fc72-v54c-x9jg was published on May 2, 2022 and was last updated on September 26, 2024. 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

MEDIUM severity

MoinMoin Cross-site Scripting (XSS) vulnerabilityGHSA-fc72-v54c-x9jg

MEDIUM

GHSA-fc72-v54c-x9jg is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in moin. 3 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for moin — see the affected versions and patch details below.

Also known asCVE-2010-0828PYSEC-2010-28

Published

May 2, 2022

Updated

Sep 26, 2024

Affected

2 pkgs

Patched

2 / 2

Exploits

3 known

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs83th percentile — riskier than 83% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected

🐍moin🐍moin

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

Cross-site scripting (XSS) vulnerability in action/Despam.py in the Despam action module in MoinMoin 1.8.7 and 1.9.2 allows remote authenticated users to inject arbitrary web script or HTML by creating a page with a crafted URI.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`moin`	≥ 1.9.0&&< 1.9.3	1.9.3`pip install --upgrade 'moin==1.9.3'`
🐍PyPI	`moin`	≥ 1.8.0&&< 1.8.8	1.8.8`pip install --upgrade 'moin==1.8.8'`

Affected Products

1 product · 2 configurations

Application

moinmoinmoinmo

2 versions

1.8.71.9.2

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.

Cross-site scripting (XSS) vulnerability in action/Despam.py in the Desp…

bugs.launchpad.netNVDAug 2017

Report on hg.moinmo.in

hg.moinmo.inNVDAug 2017

Report on bugzilla.redhat.com

bugzilla.redhat.comNVDAug 2017

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for moin, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update moin to 1.9.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-fc72-v54c-x9jg 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

Cross-site scripting (XSS) vulnerability in `action/Despam.py` in the Despam action module in MoinMoin 1.8.7 and 1.9.2 allows remote authenticated users to inject arbitrary web script or HTML by creating a page with a crafted URI.

O3 Security · Impact-Aware SCA

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