CVE-2026-6062

IDOR in Jira plugin subscription edit endpoint

State: Published
Severity: 6.4 Medium
Published: Jun 22, 2026
Updated: Jun 22, 2026
Reserved: Apr 10, 2026

Description

Mattermost versions 11.7.x <= 11.7.0, 11.6.x <= 11.6.2, 11.5.x <= 11.5.5, 10.11.x <= 10.11.17 Fail to validate channel ownership of an existing subscription before applying edits which allows an authenticated attacker to hijack subscriptions from channels they have no access to via a crafted PUT request to the subscription edit endpoint.. Mattermost Advisory ID: MMSA-2026-00650

Scores

CVSS	Score	Vector	Source
3.1	6.4 Medium	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L	Mattermost

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
MattermostMattermost	11.7.0 through 11.7.0Affected 11.6.0 through 11.6.2Affected 11.5.0 through 11.5.5Affected 10.11.0 through 10.11.17Affected 11.8.0Not affected 11.7.1Not affected 11.6.3Not affected 11.5.6Not affected 10.11.18Not affected

References

MMSA-2026-00650vendor-advisory

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.