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THREATINT
PUBLISHED

CVE-2025-46827

Graylog Allows Session Takeover via Insufficient HTML Sanitization



Description

Graylog is a free and open log management platform. Prior to versions 6.0.14, 6.1.10, and 6.2.0, it is possible to obtain user session cookies by submitting an HTML form as part of an Event Definition Remediation Step field. For this attack to succeed, the attacker needs a user account with permissions to create event definitions, while the user must have permissions to view alerts. Additionally, an active Input must be present on the Graylog server that is capable of receiving form data (e.g. a HTTP input, TCP raw or syslog etc). Versions 6.0.14, 6.1.10, and 6.2.0 fix the issue. No known workarounds are available, as long as the relatively rare prerequisites are met.

Reserved 2025-04-30 | Published 2025-05-07 | Updated 2025-05-07 | Assigner GitHub_M


HIGH: 8.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 6.0.14
affected

>= 6.1.0, < 6.1.10
affected

References

github.com/...server/security/advisories/GHSA-76vf-mpmx-777j

cve.org (CVE-2025-46827)

nvd.nist.gov (CVE-2025-46827)

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