Team Admin Bypass of Invite Permissions via allow_open_invite Field

published 2026-02-16 8 mo ago modified 2026-06-17 4 mo ago also GHSA-cgjg-p2m2-qm4p , GO-2026-4523 , EUVD-2025-206979

cvss: 3.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

Mattermost versions 10.11.x <= 10.11.9 fail to enforce invite permissions when updating team settings, which allows team administrators without proper permissions to bypass restrictions and add users to their team via API requests. Mattermost Advisory ID: MMSA-2025-00561

Patch / fix

fixed in 3 distros 2 links 1

go github.com/mattermost/mattermost/server/v8 8.0.0-20251215190648-6404ab29acc0
go github.com/mattermost/mattermost-server 5.3.2-0.20251215190648-6404ab29acc0
Mattermost Mattermost 10.11.10, 11.3.0

suse opensuse

govulncheck-vulndb openSUSE Leap 15.6 0.0.20260226T182644-150000.1.149.1

suse advisories SUSE-SU-2026:0757-1

govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1

opensuse advisories openSUSE-SU-2026:21483-1

github.com/mattermost/mattermost@6404ab2 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 8 mo ago (2026-02-17)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	2.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
GitHub	3.1	3.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/mattermost/mattermost/server/v8	<8.0.0-20251215190648-6404ab29acc0	8.0.0-20251215190648-6404ab29acc0
go	github.com/mattermost/mattermost-server	>=11.1.0 >=10.11.0 >=11.2.0 <5.3.2-0.20251215190648-6404ab29acc0 all versions >=10.11.0+incompatible >=11.1.0+incompatible >=11.2.0+incompatible	5.3.2-0.20251215190648-6404ab29acc0
go	github.com/mattermost/mattermost-server/v5	all versions	no fix listed
go	github.com/mattermost/mattermost-server/v6	all versions	no fix listed

Affected products

Mattermost Mattermost

Classification

Weakness

CWE-862 Missing Authorization

References

github.com /mattermost/mattermost/commit/6404ab29acc04901c5cb1cf5ad97fc3c0693e2cd
web
mattermost.com /security-updates
vendor-advisory, web
nvd.nist.gov /vuln/detail/CVE-2025-14573
advisory
github.com /mattermost/mattermost
package
github.com /advisories/GHSA-cgjg-p2m2-qm4p
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary