CVE-2026-7521
Last modified
CVE-2026-7521 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to verify file deletion path which allows an admin with SAML system-console write permissions to delete arbitrary files outside the config directory from the server via the remove file endpoint.. Mattermost Advisory ID: MMSA-2026-00666. EPSS estimates a 0.28% chance of exploitation in the next 30 days.
Description
Mattermost versions 11.8.x <= 11.8.0, 11.7.x <= 11.7.3, 11.6.x <= 11.6.5, 10.11.x <= 10.11.20 fail to verify file deletion path which allows an admin with SAML system-console write permissions to delete arbitrary files outside the config directory from the server via the remove file endpoint.. Mattermost Advisory ID: MMSA-2026-00666
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Server | >= 10.11.0, < 10.11.21 |
| Mattermost | Mattermost Server | >= 11.6.0, < 11.6.6 |
| Mattermost | Mattermost Server | >= 11.7.0, < 11.7.4 |
| Mattermost | Mattermost Server | >= 11.8.0, < 11.8.1 |
References
- https://mattermost.com/security-updatesVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-7521?
How severe is CVE-2026-7521?
How do I fix CVE-2026-7521?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-7517The Custom Payment Gateways for WooCommerce plugin for WordP…7.2
- CVE-2026-75170Cross-site scripting (XSS) vulnerability in the /loginContro…6.1
- CVE-2026-75171An issue in HubCore v.14.1.1 allows a remote attacker to esc…9.8
- CVE-2026-7518A flaw has been found in Open5GS up to 2.7.7. This issue aff…4.3
- CVE-2026-7519A vulnerability has been found in Fujian Apex LiveBOS up to …7.3
- CVE-2026-7520The MailChimp Forms by MailMunch plugin for WordPress is vul…8.1
- CVE-2026-7522The Advanced Database Cleaner – Premium plugin for WordPress…8.8
- CVE-2026-7523The Alba Board plugin for WordPress is vulnerable to authori…4.3
- CVE-2026-7524IBM Langflow OSS 1.0.0 through 1.9.1 could allow remote code…9.8
- CVE-2026-7525The My Calendar – Accessible Event Manager plugin for WordPr…4.3
- CVE-2026-7526The PDF Embedder plugin for WordPress is vulnerable to Sensi…4.3
- CVE-2026-7527The WP Ghost (Hide My WP Ghost) – Security & Firewall plugin…4.7
Are you affected by CVE-2026-7521?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST