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MEDIUM severity

CVE-2021-25971 — camaleon_cms

MEDIUMFix: owen2345/camaleon-cms@ab89584

CVE-2021-25971 is a medium-severity (CVSS 4.3) CWE-248 vulnerability in camaleon_cms. A fix is available for camaleon_cms — see the affected versions and patch details below.

Camaleon CMS vulnerable to Uncaught Exception

Also known asGHSA-r2w2-h6r8-3r53
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 4, 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-2021-25971.

EPSS Exploitation Probability

via FIRST.org ↗
1.0%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs63th percentile — riskier than 63% of all scored CVEsHighest risk
0.00%0.50%1.01%1.51%0.3%1.0%May 26Sep 26Nov 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
💎camaleon_cms

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

Description

In Camaleon CMS, versions 2.0.1 to 2.6.0 are vulnerable to an Uncaught Exception. The app's media upload feature crashes permanently when an attacker with a low privileged access uploads a specially crafted .svg file

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
💎RubyGemscamaleon_cms≥ 2.0.1&&< 2.6.0.12.6.0.1bundle update camaleon_cms --conservative

Affected Products

1 product · 1 configurations
Application
camaleon cmstuzitio
≥ 2.0.1 && ≤ 2.6.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update camaleon_cms to 2.6.0.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-25971 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

In Camaleon CMS, versions 2.0.1 to 2.6.0 are vulnerable to an Uncaught Exception. The app's media upload feature crashes permanently when an attacker with a low privileged access uploads a specially crafted .svg file
O3 Security · Impact-Aware SCA

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CVE-2021-25971: camaleon_cms — Fixed in 2.6.0.1