CVE-2026-66748: owen2345 camaleon-cms · Code Injection
Affects owen2345 camaleon-cmsSource CVE Database V5
Not known to be exploited · CVSS 8.7 High.
Data as of 27 Oct 2026, 05:11 UTC
- EPSS
- 1.1% chance of exploitation in 30 days – higher than 66% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 28 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| owen2345camaleon-cms | Affected
| Fixed in– |
GitHubcamaleon-cmspkg:github/camaleon-cmsOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, restrict access to users with custom_fields manage permission and monitor for suspicious activity related to custom field usage.
Description
Camaleon CMS versions 2.1.1 through 2.9.1 contains an authenticated remote code execution vulnerability that allows users with custom_fields manage permission to execute arbitrary Ruby code by supplying a malicious expression through the select_eval custom field type. Attackers can store an attacker-controlled Ruby expression in the field options command parameter, which is evaluated via instance_eval within an ERB view whenever a post edit page is rendered, achieving server-side code execution with web server process privileges.
References
- tpaidakis.com/writeups/camaleon-cms-rce-select-eval/ (opens in a new tab)
- github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field (opens in a new tab)
- github.com/owen2345/camaleon-cms/releases/tag/2.9.2 (opens in a new tab)
- github.com/owen2345/camaleon-cms/pull/1136 (opens in a new tab)
- github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f (opens in a new tab)
- vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field (opens in a new tab)
- enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/ (opens in a new tab)