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CVE-2025-22449

Access control flaw for team admins allows unauthorized team additions

LOW
3.8
CVSS Score
Published: January 9, 2025 at 06:54 AM UTC
Updated: June 17, 2026 at 08:47 AM UTC
2 products affected across 1 vendorMattermost ServerMattermost

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Severity
LOW3.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Mattermost versions 9.11.x <= 9.11.5 fail to enforce invite permissions, which allows team admins, with no permission to invite users to their team, to invite users by updating the "allow_open_invite" field via making their team public.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost Server· Mattermost
95%
9.11.0 ≤ v < 9.11.6
Mattermost· Mattermost
60%
9.11.0 ≤ v ≤ 9.11.59.11.0
Vendor states this is fixed in 10.3.0 (unaffected)
Vendor states this is fixed in 9.11.6 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.8LOWMattermost
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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