CVE-2026-7765

MEDIUM

User Messages widget leaked issuer messages on shared dashboards

Title source: cna
STIX 2.1

Description

Incorrect authorization in the User Messages dashboard widget in Checkmk <2.5.0p5 causes the message-fetching endpoints to return the dashboard creator's messages rather than the viewer's, allowing an attacker who knows a valid public dashboard share token to read the issuer's personal messages by sending requests to the underlying endpoint, even without a User Messages widget present.

References (1)

Core 1
Core References
Vendor Advisory vendor-advisory
https://checkmk.com/werk/19815

Scores

CVSS v3 5.3
EPSS 0.0019
EPSS Percentile 8.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (2)
checkmk/checkmk 2.5.0 (8 CPE variants)
Checkmk GmbH/Checkmk 2.5.0 - 2.5.0p5
Published Jun 08, 2026
Tracked Since Jun 08, 2026