Mattermost CVEs
311 vulnerabilities mapped to Mattermost’s software or packages, 0 of them in CISA’s Known Exploited Vulnerabilities catalog, newest first. Not a statement that the hosted service was exposed.
CVEs mapped to a company Rewindex tracks (by CVE affected-product data, NVD CPE, vendor advisories and package feeds), every entry in CISA’s Known Exploited Vulnerabilities catalog, and CVEs named in a tracked status incident. Other CVEs are not listed. Same list on the all-vendor CVE index.
Each column is one week (Monday start, UTC), stacked by CVSS severity, by published date or the KEV date added. Dots mark entries added to CISA KEV that week. The last week is still in progress.
CVE-2025-55035 Mattermost Desktop DoS when user has basic authentication server configured
CVSS 6.1 mediumEPSS 0.32%
CVE-2025-58073 Arbitrary Mattermost Team can be joined by manipulating the OAuth state
CVSS 8.1 highEPSS 0.42%
CVE-2025-41410 Slack import bypasses email verification for team access controls
CVSS 5.4 mediumEPSS 0.30%
CVE-2025-10545 Guest user can add unauthorized team users to private channels
CVSS 3.1 lowEPSS 0.33%
CVE-2025-58075 Arbitrary Mattermost Team can be joined by manipulating the SAML RelayState
CVSS 8.1 highEPSS 0.34%
CVE-2025-54499 Insecure string comparison enables timing attacks
CVSS 3.1 lowEPSS 0.27%
CVE-2025-41443 Guest user can discover active public channels
CVSS 4.3 mediumEPSS 0.31%
CVE-2025-58084 Mattermost Desktop App crashes when clicking on malformed external URL
CVSS 3.5 lowEPSS 0.30%
CVE-2025-11579 DoS via Out Of Memory Crash
CVSS 5.3 mediumEPSS 0.37%
CVE-2025-9081 IDOR in board file download allows any user to download any file by UUID
CVSS 3.1 lowEPSS 0.27%
CVE-2025-9079 Admin RCE via prepackaged plugins by way of misconfigured imports directory
CVSS 8.0 highEPSS 0.64%
CVE-2025-9072 One-Click Mattermost Account Takeover via Poisoned RelayState SAML Parameter
CVSS 7.6 highEPSS 0.18%
CVE-2025-9084 Open redirect in OAuth login
CVSS 3.1 lowEPSS 0.17%
CVE-2025-9078 Weak cache keys lead to post IDOR and link preview poisoning
CVSS 4.3 mediumEPSS 0.15%
CVE-2025-8402 Nil pointer dereference in bulk import crashes server
CVSS 4.9 mediumEPSS 0.32%
CVE-2025-6465 Path traversal in image upload with preview overwrite
CVSS 4.3 mediumEPSS 0.77%
CVE-2025-47870 Team invite ID leaked to team admin with no member invite privileges
CVSS 4.3 mediumEPSS 0.22%
CVE-2025-49222 Mattermost Shared Channel Upload Type Validation Bypass
CVSS 6.8 mediumEPSS 0.30%
CVE-2025-8023 Path Traversal in Template Upload Allows Uploading Files Outside Target Directory
CVSS 6.8 mediumEPSS 0.41%
CVE-2025-47700 AI plugin APIs can be triggered using post actions
CVSS 3.5 lowEPSS 0.19%
CVE-2025-49810 Thread summarization allows persistent access to channel
CVSS 3.5 lowEPSS 0.20%
CVE-2025-36530 Import Path Traversal Enables Unauthorized Unsigned Plugin Installation
CVSS 6.8 mediumEPSS 0.49%
CVE-2025-8285 Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin
CVSS 4.0 mediumEPSS 0.20%
CVE-2025-54478 Unauthenticated Channel Subscription Edit in Mattermost Confluence Plugin
CVSS 7.2 highEPSS 0.24%
CVE-2025-54463 Unexpected Input to Cloud Webhook endpoint Causes DoS in Mattermost Confluence Plugin
CVSS 5.9 mediumEPSS 0.30%
CVE-2025-54458 Unauthorized Subscription Creation to Confluence Space in Mattermost Confluence Plugin
CVSS 5.0 mediumEPSS 0.21%
CVE-2025-53910 Unauthorized Channel Subscription Edit in Mattermost Confluence Plugin
CVSS 4.0 mediumEPSS 0.20%
CVE-2025-53514 Unexpected Input to Server Webhook endpoint Causes DoS in Mattermost Confluence Plugin
CVSS 5.9 mediumEPSS 0.29%
CVE-2025-49221 Unauthenticated Access to Channel Subscription in Mattermost Confluence Plugin
CVSS 3.7 lowEPSS 0.25%
CVE-2025-48731 Unauthorized Subscription Edit to Confluence Space in Mattermost Confluence Plugin
CVSS 6.4 mediumEPSS 0.18%
CVE-2025-44004 Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin
CVSS 7.2 highEPSS 0.21%
CVE-2025-44001 Unauthorized Channel Subscription Read in Mattermost Confluence Plugin
CVSS 4.0 mediumEPSS 0.21%
CVE-2025-6227 Invite token is used as part of the secure communication
CVSS 2.2 lowEPSS 0.22%
CVE-2025-6233 Arbitrary file read by system admin via path traversal
CVSS 6.8 mediumEPSS 0.45%
CVE-2025-6226 IDOR in CreatePost API allows for timeboxed message disclosure
CVSS 6.5 mediumEPSS 0.37%
CVE-2025-3228 Unauthorized Guest user access to Playbook
CVSS 4.3 mediumEPSS 0.29%
CVE-2025-3227 Unauthorized channel member management through playbook runs
CVSS 4.3 mediumEPSS 0.25%
CVE-2025-4981 Path Traversal Leading to RCE by Any Authenticated Mattermost User
CVSS 9.9 criticalEPSS 1.0%
CVE-2025-4128 Mattermost Guest User Information Disclosure Vulnerability
CVSS 3.1 lowEPSS 0.22%
CVE-2025-4573 LDAP Injection in Mattermost Enterprise Edition When Using Active Directory
CVSS 4.1 mediumEPSS 0.28%
CVE-2025-2571 Google OAuth Authentication Bypass for Converted Bot Accounts
CVSS 4.2 mediumEPSS 0.21%
All vendors’ CVEs · JSON · Markdown
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)