CVE-2026-24906
published 2026-04-14CVE-2026-24906: October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a Stored Cross-Site Scripting (XSS) vulnerability in…
PriorityP428medium5.4CVSS 3.1
AVNACLPRLUIRSCCLILAN
EPSS
0.25%
16.4th percentile
October is a Content Management System (CMS) and web platform. Versions prior to 3.7.14 and 4.1.10 contain a Stored Cross-Site Scripting (XSS) vulnerability in the Backend Editor Settings. The Markup Classes fields (used for paragraph styles, inline styles, table styles, etc.) did not sanitize input to valid CSS class name characters. Malicious values were rendered unsanitized in Froala editor dropdown menus, allowing JavaScript execution when any user opened a RichEditor. Exploitation could lead to privilege escalation if a superuser opens any RichEditor during routine content editing (e.g., editing a blog post), and requires authenticated backend access with editor settings permissions. This issue has been fixed in versions 3.7.14 and 4.1.10. To workaround this issue, restrict editor settings permissions to fully trusted administrators only
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| october | system | >= 0 < 3.7.14 | 3.7.14 |
| october | system | >= 4.0.0 < 4.1.10 | 4.1.10 |
| octobercms | october | < 3.7.14 | 3.7.14 |
| octobercms | october | <= 3.7.13 | — |
| octobercms | october | — | — |
| octobercms | october | 4.0.0 – 4.1.9 | — |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
nvdv4.05.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/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
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GHSA
October CMS has Stored XSS in Backend Editor Markup Classes
ghsa·2026-04-14
CVE-2026-24906 [MEDIUM] CWE-79 October CMS has Stored XSS in Backend Editor Markup Classes
October CMS has Stored XSS in Backend Editor Markup Classes
A stored cross-site scripting (XSS) vulnerability was identified in the Backend Editor Settings. The Markup Classes fields (used for paragraph styles, inline styles, table styles, etc.) did not sanitize input to valid CSS class name characters. Malicious values were rendered unsanitized in Froala editor dropdown menus, allowing JavaScript execution when any user opened a RichEditor.
### Impact
- Stored XSS via editor settings rendered in RichEditor dropdowns
- Could allow privilege escalation if a superuser opens any RichEditor (e.g., editing a blog post)
- Requires authenticated backend access with editor settings permissions
- Triggers on routine content editing operations
### Patches
The vulnerability has been patched in v3.
VulDB
October CMS up to 3.7.13/4.1.9 Setting cross site scripting (GHSA-6qmh-j78v-ffp7)
vuldb·2026-04-14·CVSS 5.1
CVE-2026-24906 [MEDIUM] October CMS up to 3.7.13/4.1.9 Setting cross site scripting (GHSA-6qmh-j78v-ffp7)
A vulnerability labeled as problematic has been found in October CMS up to 3.7.13/4.1.9. This issue affects some unknown processing of the component Setting Handler. The manipulation results in cross site scripting.
This vulnerability is known as CVE-2026-24906. It is possible to launch the attack remotely. No exploit is available.
The affected component should be upgraded.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-04-14
Published