CVSS VectorNVD
CVSS: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
Lifecycle Timeline
2DescriptionNVD
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.
AnalysisAI
Stored cross-site scripting (XSS) in October CMS versions prior to 3.7.14 and 4.1.10 allows authenticated users with Event Log viewing permissions to execute arbitrary JavaScript in other users' browsers via malicious HTML content in the mail preview iframe. The vulnerability stems from improper iframe sandboxing when rendering logged email messages, affecting confidentiality and integrity with a CVSS score of 5.1. …
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-22660
GHSA-j4j5-9x6g-rgxc