Stored Cross-Site Scripting Vulnerability in October CMS Event Log Feature
CVE-2026-24907

5.1MEDIUM

Key Information:

Vendor

Octobercms

Status
October
Vendor
CVE Published:
14 April 2026

What is CVE-2026-24907?

A stored cross-site scripting vulnerability exists in the Event Log mail preview feature of October CMS. This flaw arises when HTML content is rendered in an iframe without adequate sandboxing, which allows for the potential execution of malicious JavaScript in a victim's browser context. This issue affects versions of the software prior to 3.7.14 and 4.1.10. Users are advised to update to these versions to mitigate the risk, and if immediate updates cannot be made, it's recommended to restrict mail template editing and Event Log viewing permissions to trusted administrators only.

Affected Version(s)

october < 3.7.14 < 3.7.14

october >= 4.0.0, < 4.1.10 < 4.0.0, 4.1.10

References

https://github.com/octobercms/october/security/advisories...
x_refsource_CONFIRM

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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