CVE-2021-25969Network attack vector

Stored script execution via unsanitized comment rendering

Published Oct 20, 2021 · Updated Apr 30, 2025

Stored XSS in Camaleon CMS 0.0.1 through 2.6.0 allows remote attackers to execute scripts in a victim's browser through post comments. Comment templates render comment.content with Rails raw, and the administrative helper interpolates it without sanitization, preserving attacker-supplied markup. No authentication is required to submit the comment, but a victim must open a page containing the stored comment; execution is limited to that browser context.

CVSS severity6.1
Medium
EPSS probability0.81%
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 Camaleon CMS 0.0.1 through 2.6.0 allows remote attackers to execute scripts in a victim's browser through post comments. Comment templates render comment.content with Rails raw, and the administrative helper interpolates it without sanitization, preserving attacker-supplied markup. No authentication is required to submit the comment, but a victim must open a page containing the stored comment; execution is limited to that browser context.

The record

CVE
CVE-2021-25969
Published
Oct 20, 2021
Updated
Apr 30, 2025
Vendor
Camaleon CMS
Product
Camaleon CMS
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 20, 2021CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.0.1 <unspecified
  2. Affected versionversion=unspecified <=2.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Camaleon CMS · Camaleon CMSversion=0.0.1 <unspecified; version=unspecified <=2.6.0

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1MendCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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