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CVE-2025-64641

16
FAUCET Score

CVE-2025-64641 is a medium-severity vulnerability affecting Mattermost versions 11.1.0 and earlier, 11.0.5 and earlier, 10.12.3 and earlier, and 10.11.7 and earlier. It allows a malicious Mattermost user to exfiltrate Jira tickets by crafting posts that trick victim users into interacting with a /share-issue-publicly action not originating from the legitimate Jira plugin. The vulnerability has a CVSS score of 4.1 (MEDIUM) due to its network-based attack vector, low complexity, and requirement for user interaction, leading to a potential low confidentiality impact. There is currently no evidence of active exploitation, no public exploit code available (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage, indicating low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
>= 10.11.0, <= 10.11.7CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 10.12.0, <= 10.12.3CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 11.0.0, <= 11.0.5CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 11.1.0, <= 11.1.0CPE match
cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*
>= 10.11.0, < 10.11.8CPE matchmatch criteria
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.1MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.3
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.15%
Probability of exploitation in next 30 days
EPSS Percentile
4.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0015 is in the 2nd percentile among its peer group of 15,239 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

gopatch availablevia ghsa
Product: github.com/mattermost/mattermost/server/v8Fixed in: 8.0.0-20251121122154-b57c297c6d7
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 10.11.8
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 10.12.4
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 11.0.6
gopatch availablevia ghsa
Product: github.com/mattermost/mattermost-serverFixed in: 11.1.1

Vendor Advisories (1)

goGHSA-vww6-79rv-3j4xmedium

Mattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin

Dec 24, 2025

References

mattermost.com / security-updates
Vendor Advisory