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MEDIUM severity

CVE-2024-55342 — Piranha

MEDIUM

CVE-2024-55342 is a medium-severity (CVSS 4.7) Cross-site Scripting (XSS) vulnerability in Piranha. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

Piranha CMS Cross-site Scripting vulnerability

Also known asGHSA-cmwp-442x-3rcv
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
None indexed
Exploitation data as of Oct 23, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2024-55342.

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs42th percentile — riskier than 42% of all scored CVEsHighest risk
0.00%0.34%0.67%1.01%0.1%0.5%Apr 26Aug 26Oct 26

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

1 pkg affected
.NETPiranha

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

Description

A file upload functionality in Piranha CMS 11.1 allows authenticated remote attackers to upload a crafted PDF file to /manager/media. This PDF can contain malicious JavaScript code, which is executed when a victim user opens or interacts with the PDF in their web browser, leading to a XSS vulnerability.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
.NETNuGetPiranhaall versionsNo fix

Affected Products

1 product · 1 configurations
Application
piranha cmsdotnetfoundation
1 version
11.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Remediation status

    The records we use list no patched version of Piranha for CVE-2024-55342. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    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

A file upload functionality in Piranha CMS 11.1 allows authenticated remote attackers to upload a crafted PDF file to /manager/media. This PDF can contain malicious JavaScript code, which is executed when a victim user opens or interacts with the PDF in their web browser, leading to a XSS vulnerability.
O3 Security · Impact-Aware SCA

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CVE-2024-55342: Piranha XSS (Medium 4.7)