CVE-2024-36250Network attack vector

Authenticated session access via MFA code replay

Published Nov 9, 2024 · Updated Nov 12, 2024

Authentication replay in Mattermost 9.11.0 through 9.11.2 and 9.5.0 through 9.5.10 allows remote authenticated users to reuse an MFA code. The authentication flow accepts the same MFA code again for about 30 seconds instead of invalidating it after its first successful use. Reachability requires an MFA-enabled account and possession of a recently used code; successful reuse permits another authenticated session without directly interrupting service.

CVSS severity3.1
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication replay in Mattermost 9.11.0 through 9.11.2 and 9.5.0 through 9.5.10 allows remote authenticated users to reuse an MFA code. The authentication flow accepts the same MFA code again for about 30 seconds instead of invalidating it after its first successful use. Reachability requires an MFA-enabled account and possession of a recently used code; successful reuse permits another authenticated session without directly interrupting service.

The record

CVE
CVE-2024-36250
Published
Nov 9, 2024
Updated
Nov 12, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-294, CWE-303, T1111
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 12, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.11.0 <=9.11.2
  2. Affected versionversion=9.5.0 <=9.5.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=9.11.0 <=9.11.2; version=9.5.0 <=9.5.10

Published CVSS scores

4.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
3.1Mattermost, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-294Authentication Bypass by Capture-replay
CWE-303Incorrect Implementation of Authentication Algorithm
T1111Multi-Factor Authentication Interception

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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