CVE-2026-24907
published 2026-04-14CVE-2026-24907: 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…
PriorityP426medium5.4CVSS 3.1
AVNACLPRLUIRSCCLILAN
EPSS
0.20%
9.8th 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 Event Log mail preview feature. When viewing logged mail messages, HTML content was rendered in an iframe without proper sandboxing, allowing JavaScript execution in the viewer's browser context. This issue has been fixed in versions 3.7.14 and 4.1.10. If users are unable to update immediately, workarounds include restricting mail template editing permissions to fully trusted administrators only and restricting Event Log viewing permissions to minimize exposure.
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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VulDB
October CMS up to 3.7.13/4.1.9 Mail Message cross site scripting (GHSA-j4j5-9x6g-rgxc)
vuldb·2026-04-14·CVSS 5.1
CVE-2026-24907 [MEDIUM] October CMS up to 3.7.13/4.1.9 Mail Message cross site scripting (GHSA-j4j5-9x6g-rgxc)
A vulnerability marked as problematic has been reported in October CMS up to 3.7.13/4.1.9. Impacted is an unknown function of the component Mail Message Handler. This manipulation causes cross site scripting.
This vulnerability is handled as CVE-2026-24907. The attack can be initiated remotely. There is not any exploit available.
It is suggested to upgrade the affected component.
GHSA
October CMS has Stored XSS in Event Log Mail Preview
ghsa·2026-04-14
CVE-2026-24907 [MEDIUM] CWE-79 October CMS has Stored XSS in Event Log Mail Preview
October CMS has Stored XSS in Event Log Mail Preview
A stored cross-site scripting (XSS) vulnerability was identified in the Event Log mail preview feature. When viewing logged mail messages, HTML content was rendered in an iframe without proper sandboxing, allowing JavaScript execution in the viewer's browser context.
### Impact
- Stored XSS via mail template content rendered in Event Log
- Could allow privilege escalation if a superuser views a malicious log entry
- Requires authenticated backend access with mail template editing permissions
- Requires a superuser to view the specific Event Log entry to trigger
### Patches
The vulnerability has been patched in v3.7.14 and v4.1.10. All users are encouraged to upgrade to the latest patched version.
### Workarounds
If upgrading immediat
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2026-04-14
Published