Public proof of conceptFix available

CVE-2021-25969

Q: Is CVE-2021-25969 actively exploited?

A proof-of-concept exploit exists for CVE-2021-25969, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2021-25969?

CVE-2021-25969 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

A public proof of concept exists; no exploitation attested.

Published2021-10-20
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In Camaleon CMS application, versions 0.0.1 to 2.6.0 are vulnerable to stored XSS, that allows an unauthenticated attacker to store malicious scripts in the comments section of the post. These scripts are executed in a victim’s browser when they open the page containing the malicious comment.

Timeline

dates in UTC

2021-10-2012:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-25969?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-25969?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Tuzitio camaleon cms

Branch	Affected	Fixed in	Source
2.6	≥ 0.0.1, ≤ 2.6.0	no fix published	NVD

camaleon_cms

Branch	Affected	Fixed in	Source
2.6	≥ 0.0.1, < 2.6.0.1	2.6.0.1	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionpoc2025-04-30
OpenCVESSVC decisionpoc—
CNACVSS 3.16.1read 2026-10-23
NVDCVSS 3.16.1read 2026-10-23
NVDCVSS 2.04.3read 2026-10-23
CNAweakness (CWE)CWE-79read 2026-10-23
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score0.8 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Published: 2021-10-20
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-25969?

Is CVE-2021-25969 actively exploited?

A proof-of-concept exploit exists for CVE-2021-25969, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2021-25969?

CVE-2021-25969 has a CVSS v3 base score of 6.1 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

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