Latest CVE Feed

Vulnerabilities published in the last 30 days. Filter by severity, exploit status, or attack vector.

Score
Vulnerability
Published
4.3 MEDIUM
CVE-2026-6343 — Mattermost Playbooks Plugin fails to enforce view permissions in list endpoints, allowing…

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check public/private permissions which allows members without these permissions to access public playbooks via /get…

mattermost_server | Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-6339 — Missing request origin validation on burn-on-read reveal endpoint

Mattermost versions 11.5.x <= 11.5.1, 11.4.x <= 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the revea…

mattermost_server | Remote | Cross-Site Request Forgery
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
3.5 LOW
CVE-2026-6333 — SSRF via Host Header Spoofing in Custom Slash Commands

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect…

Remote | Server-Side Request Forgery
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
6.5 MEDIUM
CVE-2026-5163 — Missing authorization check in AI message rewrite endpoint allows access to private threa…

Mattermost versions 11.5.x <= 11.5.1 fail to verify channel membership when processing AI-assisted message rewrites which allows an authenticated attacker to read the content of threads in private ch…

mattermost_server | Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
3.5 LOW
CVE-2026-4643 — Calling window.close() from server-side content causes crash in the Mattermost Desktop App

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server …

Remote | Denial of Service
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-4286 — Playbooks Plugin fails to validate team transfers, allowing unauthorized removal of membe…

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to check if {{team_id}} was being changed when updating playbooks, allowing users with only {{Manage Playbook Configurations}} permissio…

mattermost_server | Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
6.5 MEDIUM
CVE-2026-3471 — Opening a window with {{javascript:alert()}} as URL causes crash in the Mattermost Deskto…

Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent an invalid URL from loading in a pop-up window in the Mattermost Desktop App which allows a malicious server owner to repeated cra…

Remote | Denial of Service
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
6.5 MEDIUM
CVE-2026-3117 — Instance and webhook GitLab plugin commands were able to be run by non-admin users

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to properly check for permissions when processing commands in the Gitlab plugin which allows normal users to uninstall instances or se…

Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-28732 — Slash command trigger-word update allowed command hijacking

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 Fail to enforce slash command trigger-word uniqueness during command updates which allows an authenticated team member with…

Remote | Authentication
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
0.0 NA
CVE-2026-8788 — Net::Statsd::Lite versions through 0.10.0 for Perl allowed metric injections

Net::Statsd::Lite versions through 0.10.0 for Perl allowed metric injections. The values from the set_add method were not checked for newlines, colons or pipes. Metrics generated from untrusted sour…

| Injection
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-6342 — Group prefix matching bypass for subscriptions

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to appropriately check for valid namespaces which allows plugin users to create subscriptions to groups that were not whitelisted via …

Remote | Misconfiguration
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-6341 — Incomplete group locking implementation

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multip…

Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-6340 — Memory Exhaustion via Malicious 7zip File Upload

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exh…

Remote | Denial of Service
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
3.1 LOW
CVE-2026-6334 — OAuth authorization code client binding not enforced during token redemption in Mattermost

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce client identity binding during the OAuth authorization code redemption flow which allows an authenticated OAuth client to red…

Remote | Authentication
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
3.7 LOW
CVE-2026-4273 — Insufficient token rotation validation in remote cluster invite confirmation

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate that the RefreshedToken differs from the original invite token during remote cluster invite confirmation which allows an aut…

Remote | Authentication
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-3637 — Mattermost fails to enforce create_post permission when editing posts

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to check the create_post channel permission during post edit operations which allows an authenticated attacker with re…

Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
3.8 LOW
CVE-2026-3495 — Unescaped variables during error page composition

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to escape some variables that could contain malicious content during error page composition which allows an attacker with access to edit…

Remote | Cross-Site Scripting
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
6.5 MEDIUM
CVE-2026-2325 — Improper Input Validation in MS Teams Meetings API Handler

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to limit the size of the request body on the start meeting API endpoint, which allows an authenticated attacker to cau…

mattermost_server | Remote | Denial of Service
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
4.3 MEDIUM
CVE-2026-28759 — Insufficient authorization in shared channel membership sync allows remote cluster to rem…

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate that a remote cluster has access to a channel before processing membership removal requests during shared …

mattermost_server | Remote | Authorization
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
7.1 HIGH
CVE-2026-6495 — Ajax Load More < 7.8.4 - Reflected XSS

The Ajax Load More WordPress plugin before 7.8.4 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used again…

Remote | Cross-Site Scripting
May 18, 2026 May 18, 2026
May 18, 2026
May 18, 2026
Showing 20 of 6209 Results