CVE-2021-25969

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.8%, top 48% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this weekElevated
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
—
EPSS
52.2%
KEV
Not listed

Published

October 20, 2021

Last Modified

November 21, 2024

References (4)

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
camaleon_cms0.0.1 ... 2.6.0 (100 versions)2.6.0.1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:45 UTCEG score recompute
  2. 2026-07-22 14:06 UTCEPSS rescore
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  43. 2026-06-12 18:40 UTCOSV refresh
  44. 2026-06-11 13:58 UTCEPSS rescore
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  73. 2026-05-26 08:41 UTCEG score recompute
  74. 2026-05-26 07:17 UTCEPSS rescore
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Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-25969?
CVE-2021-25969 is a medium vulnerability published on October 20, 2021. 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.
When was CVE-2021-25969 disclosed?
CVE-2021-25969 was first published in the National Vulnerability Database on October 20, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-25969 actively exploited?
CVE-2021-25969 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 52.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-25969?
CVE-2021-25969 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2021-25969?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-25969, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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