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CVE-2024-11599

Domain Restriction Bypass on Registration

MEDIUM
5.3
CVSS Score
Published: November 28, 2024 at 09:42 AM UTC
Updated: June 17, 2026 at 06:58 AM UTC
2 products affected across 1 vendorMattermost ServerMattermost

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

Mattermost versions 10.0.x <= 10.0.1, 10.1.x <= 10.1.1, 9.11.x <= 9.11.3, 9.5.x <= 9.5.11 fail to properly validate email addresses which allows an unauthenticated user to bypass email domain restrictions via carefully crafted input on email registration.

Affected

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

Mattermost Server· Mattermost
95%
10.0.0 ≤ v < 10.0.210.1.0 ≤ v < 10.1.29.11.0 ≤ v < 9.11.49.5.0 ≤ v < 9.5.12
Mattermost· Mattermost
60%
10.0.0 ≤ v ≤ 10.0.110.1.0 ≤ v ≤ 10.1.19.11.0 ≤ v ≤ 9.11.39.5.0 ≤ v ≤ 9.5.1110.0.010.1.09.11.09.5.0
Vendor states this is fixed in 10.0.2 (unaffected)
Vendor states this is fixed in 10.1.2 (unaffected)
Vendor states this is fixed in 10.2.0 (unaffected)
Vendor states this is fixed in 9.11.4 (unaffected)
Vendor states this is fixed in 9.5.12 (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 exploitAutomatablePartial impact

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

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-754

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