Advisory details:
vulnrichment / CVE-2026-66748
| Advisory ID | vulnrichment/CVE-2026-66748 |
| Aliases | |
| Summary | 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. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 0.0 |
| Risk | |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 8.8 | |
| cvssv4 | 8.7 | |
| ssvc | Track* |
| Reference id | Reference type | URL |
|---|---|---|
| 1136 | Bug | https://github.com/owen2345/camaleon-cms/pull/1136 |
| 158823668e2e5c3114a69b34cf1c96cb41533c5f | Other | https://github.com/owen2345/camaleon-cms/commit/158823668e2e5c3114a69b34cf1c96cb41533c5f |
| 2.9.2 | Other | https://github.com/owen2345/camaleon-cms/releases/tag/2.9.2 |
| camaleon-cms-authenticated-rce-via-select-eval-custom-field | Advisory | https://www.vulncheck.com/advisories/camaleon-cms-authenticated-rce-via-select-eval-custom-field |
| Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field | Exploit | https://github.com/theopaid/Camaleon-CMS---Authenticated-RCE-via-select_eval-Custom-Field |
| camaleon-cms-rce-select-eval | Exploit | https://tpaidakis.com/writeups/camaleon-cms-rce-select-eval/ |
| Camaleon-CMS-Vulnerabilties | Exploit | https://enrik-m.github.io/posts/Camaleon-CMS-Vulnerabilties/ |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
| Attack Vector (AV) | Attack Complexity (AC) | Attack Requirements (AT) | Privileges Required (PR) | User Interaction (UI) | Vulnerable System Impact Confidentiality (VC) | Vulnerable System Impact Integrity (VI) | Vulnerable System Impact Availability (VA) | Subsequent System Impact Confidentiality (SC) | Subsequent System Impact Integrity (SI) | Subsequent System Impact Availability (SA) |
|---|---|---|---|---|---|---|---|---|---|---|
network adjacent local physical |
low high |
none present |
none low high |
none passive active |
high low none |
high low none |
high low none |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:P/A:N/T:T/P:M/B:A/M:M/D:R/2026-07-28T19:26:54Z/
Decision: Track*
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/66xxx/CVE-2026-66748.json
Source Advisory: vulnrichment/CVE-2026-66748
[{'Exploitation': 'poc'},
{'Automatable': 'no'},
{'Technical Impact': 'total'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]