CVE-2025-54499 - Vulnerability Details - OpenCVE

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

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00027.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

Advisories

Source	ID	Title
Github GHSA	GHSA-xr3w-rmvj-f6m7	Mattermost has an Observable Timing Discrepancy vulnerability

Fixes

Solution

Update Mattermost to versions 10.12.0, 10.5.11, 10.11.3 or higher.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://mattermost.com/security-updates

History

Thu, 16 Oct 2025 14:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 16 Oct 2025 08:30:00 +0000

Type	Values Removed	Values Added
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
Title		Insecure string comparison enables timing attacks
Weaknesses		CWE-208
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}`

MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-10-16T08:17:20.937Z

Updated: 2025-10-16T13:51:10.320Z

Reserved: 2025-09-16T08:32:57.368Z

Link: CVE-2025-54499

Vulnrichment

Updated: 2025-10-16T13:50:02.665Z

NVD

Status : Awaiting Analysis

Published: 2025-10-16T09:15:34.507

Modified: 2025-10-16T15:28:59.610

Link: CVE-2025-54499

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-54499", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2025-09-16T08:32:57.368Z", "datePublished": "2025-10-16T08:17:20.937Z", "dateUpdated": "2025-10-16T13:51:10.320Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "10.5.10", "status": "affected", "version": "10.5.0", "versionType": "semver"}, {"lessThanOrEqual": "10.11.2", "status": "affected", "version": "10.11.0", "versionType": "semver"}, {"version": "10.12.0", "status": "unaffected"}, {"version": "10.5.11", "status": "unaffected"}, {"version": "10.11.3", "status": "unaffected"}]}], "credits": [{"lang": "en", "type": "finder", "value": "DoyenSec"}], "descriptions": [{"lang": "en", "value": "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"}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "availabilityImpact": "NONE", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "baseSeverity": "LOW", "baseScore": 3.1}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-208: Observable Timing Discrepancy", "cweId": "CWE-208"}]}], "references": [{"url": "https://mattermost.com/security-updates"}], "solutions": [{"value": "Update Mattermost to versions 10.12.0, 10.5.11, 10.11.3 or higher.", "lang": "en"}], "source": {"advisory": "MMSA-2025-00516", "defect": ["https://mattermost.atlassian.net/browse/MM-64968"], "discovery": "EXTERNAL"}, "title": "Insecure string comparison enables timing attacks", "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-10-16T08:17:20.937Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2025-10-16T13:49:58.206427Z", "id": "CVE-2025-54499", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-16T13:51:10.320Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2025-54499", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-16T13:49:58.206427Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-16T13:50:02.665Z"}}], "cna": {"title": "Insecure string comparison enables timing attacks", "source": {"defect": ["https://mattermost.atlassian.net/browse/MM-64968"], "advisory": "MMSA-2025-00516", "discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "DoyenSec"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.1, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "Mattermost", "product": "Mattermost", "versions": [{"status": "affected", "version": "10.5.0", "versionType": "semver", "lessThanOrEqual": "10.5.10"}, {"status": "affected", "version": "10.11.0", "versionType": "semver", "lessThanOrEqual": "10.11.2"}, {"status": "unaffected", "version": "10.12.0"}, {"status": "unaffected", "version": "10.5.11"}, {"status": "unaffected", "version": "10.11.3"}], "defaultStatus": "unaffected"}], "solutions": [{"lang": "en", "value": "Update Mattermost to versions 10.12.0, 10.5.11, 10.11.3 or higher."}], "references": [{"url": "https://mattermost.com/security-updates"}], "descriptions": [{"lang": "en", "value": "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"}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-208", "description": "CWE-208: Observable Timing Discrepancy"}]}], "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2025-10-16T08:17:20.937Z"}}}, "cveMetadata": {"cveId": "CVE-2025-54499", "state": "PUBLISHED", "dateUpdated": "2025-10-16T13:51:10.320Z", "dateReserved": "2025-09-16T08:32:57.368Z", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "datePublished": "2025-10-16T08:17:20.937Z", "assignerShortName": "Mattermost"}, "dataVersion": "5.1"}