// For flags

CVE-2025-20086

Insufficient Input Validation on Post Props

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.

*Credits: c0rydoras (c0rydoras)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2025-01-14 CVE Reserved
  • 2025-01-15 CVE Published
  • 2025-02-12 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-1287: Improper Validation of Specified Type of Input
CAPEC
References (1)
URL Tag Source
https://mattermost.com/security-updates
URL Date SRC
URL Date SRC
URL Date SRC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 9.11.0 <= 9.11.5
Search vendor "Mattermost" for product "Mattermost" and version " >= 9.11.0 <= 9.11.5"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 10.0.0 <= 10.0.3
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.0.0 <= 10.0.3"
en
Affected
Mattermost
Search vendor "Mattermost"
 Mattermost
Search vendor "Mattermost" for product "Mattermost"
 >= 10.1.0 <= 10.1.3
Search vendor "Mattermost" for product "Mattermost" and version " >= 10.1.0 <= 10.1.3"
en
Affected