CVE-2024-55341Public exploitNetwork attack vector

Authenticated script execution via unsanitized Markdown output

Published Dec 20, 2024 · Updated Dec 20, 2024

Stored XSS in Piranha CMS 11.1 allows remote authenticated users to execute JavaScript in another user's browser via Markdown. MarkdownField.ToHtml() renders attacker-controlled HTML without sanitization, preserving event-handler payloads added through /manager/pages. Manager access is required to create the page, and execution occurs when another user views the rendered content, exposing that browser session's data.

CVSS severity4.7
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Piranha CMS 11.1 allows remote authenticated users to execute JavaScript in another user's browser via Markdown. MarkdownField.ToHtml() renders attacker-controlled HTML without sanitization, preserving event-handler payloads added through /manager/pages. Manager access is required to create the page, and execution occurs when another user views the rendered content, exposing that browser session's data.

The record

CVE
CVE-2024-55341
Published
Dec 20, 2024
Updated
Dec 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 20, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 20, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.7CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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