Stored Cross-Site Scripting Vulnerability in MISP Overmind Theme
CVE-2026-54393

5.1MEDIUM

Key Information:

Vendor

Misp

Status
Misp
Vendor
CVE Published:
12 June 2026

What is CVE-2026-54393?

A vulnerability exists in MISP when utilizing the Overmind theme, where the setHomePage endpoint allows for stored cross-site scripting (XSS). An attacker, leveraging the failure of the setSettingInternal() function to enforce proper input validation, can manipulate user-controlled values to store malicious scripts. This poses a risk as these scripts are executed in the browser context of the affected MISP instance when the homepage link is generated in the news view. The issue has been addressed by ensuring that homepage settings are validated and escaped properly before rendering.

Affected Version(s)

misp 0 < 2.5.40

References

https://github.com/MISP/MISP/commit/d4733ca5d2fcceb12abc7...
patch

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

Credit

Jeroen Pinoy
Andras Iklody
.