CVE-2025-54499
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-10-16

Last updated on: 2025-10-21

Assigner: Mattermost, Inc.

Description
Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to use constant-time comparison for sensitive string comparisons which allows attackers to exploit timing oracles to perform byte-by-byte brute force attacks via response time analysis on Cloud API keys and OAuth client secrets
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Meta Information
Published
2025-10-16
Last Modified
2025-10-21
Generated
2026-06-16
AI Q&A
2025-10-16
EPSS Evaluated
2026-06-14
NVD
CVE-2025-54499
EUVD
EUVD-2025-34730
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.5.0 (inc) to 10.5.11 (exc)
mattermost mattermost_server From 10.11.0 (inc) to 10.11.3 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-208 Two separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
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Executive Summary

This vulnerability exists in Mattermost versions 10.5.x up to 10.5.10 and 10.11.x up to 10.11.2, where the software fails to use constant-time comparison for sensitive string comparisons. This flaw allows attackers to exploit timing oracles by analyzing response times to perform byte-by-byte brute force attacks on Cloud API keys and OAuth client secrets.

Impact Analysis

An attacker can use this vulnerability to gradually guess sensitive credentials such as Cloud API keys and OAuth client secrets by measuring response times. This can lead to unauthorized access to systems or data protected by these credentials, potentially compromising security.

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