How severe is GHSA-9gj2-ph57-56f5?

No CVSS score has been assigned to GHSA-9gj2-ph57-56f5 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-9gj2-ph57-56f5?

GHSA-9gj2-ph57-56f5 affects the following packages: moin (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-9gj2-ph57-56f5?

Update moin to 1.5.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9gj2-ph57-56f5 is resolved across your whole dependency graph.

How do I detect GHSA-9gj2-ph57-56f5 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-9gj2-ph57-56f5 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-9gj2-ph57-56f5 actively exploited in the wild?

No public exploit code has been indexed for GHSA-9gj2-ph57-56f5 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-9gj2-ph57-56f5?

GHSA-9gj2-ph57-56f5 has an EPSS (Exploit Prediction Scoring System) score of 1.8%, 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.

When was GHSA-9gj2-ph57-56f5 published, and has it been updated?

GHSA-9gj2-ph57-56f5 was published on May 1, 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.

GHSA-9gj2-ph57-56f5: moin XSS

EPSS Exploitation Probability

via FIRST.org ↗

1.8%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

🐍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

Multiple cross-site scripting (XSS) vulnerabilities in Info pages in MoinMoin 1.5.7 allow remote attackers to inject arbitrary web script or HTML via the (1) hitcounts and (2) general parameters, different vectors than CVE-2007-0857. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`moin`	all versions	1.5.8`pip install --upgrade 'moin==1.5.8'`

Affected Products

1 product · 1 configurations

Application

moinmoinmoinmoin

1 version

1.5.7

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 1.5.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-9gj2-ph57-56f5 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.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Ubuntu

USN-423-1Ubuntu

Frequently Asked Questions

Multiple cross-site scripting (XSS) vulnerabilities in Info pages in MoinMoin 1.5.7 allow remote attackers to inject arbitrary web script or HTML via the (1) hitcounts and (2) general parameters, different vectors than CVE-2007-0857. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

O3 Security · Impact-Aware SCA

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GHSA-9gj2-ph57-56f5 — moin