CVEvulnerability
CVE-2026-66748
8.7 HIGH
Official page ↗
- Status
- Deferred
- Published
- 2026-07-28
- Last modified
- 2026-10-24
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 8.7 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 8.8 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-94
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.
Related
Weakness · CWE (1)
- CWE-94 Improper Control of Generation of Code weakness
References
- https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/ enrik-m.github.io
- https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f github.com
- https://github.com/owen2345/camaleon-cms/pull/1136 github.com
- https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2 github.com
- https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field github.com
- https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/ tpaidakis.com
- https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field www.vulncheck.com
- https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field github.com