GHSA-2j87-p623-8cc2Published

Webhook Secret Exposure via Timing attack in MSteams plugin

Exploitation and risk

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cve-program · CVE-2025-27936

Published

Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.

Source published: 16 Apr 2025 09:14:55 UTC
Source modified: 16 Apr 2025 14:32:45 UTC
Saved here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

euvd · EUVD-2025-11359

Published

Additional publisher context

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Apr 16, 2025, 9:14:55 AM

dateUpdated: Apr 16, 2025, 2:32:45 PM

2 related source bulletins · separate from aliases

openSUSE-SU-2025:15017-1: govulncheck-vulndb-0.0.20250422T181640-1.1 on GA media

CVE-2019-15119 · CVE-2025-1386 · CVE-2025-2424 · CVE-2025-24358 · CVE-2025-2475 · CVE-2025-24839 · CVE-2025-24866 · CVE-2025-2564 · CVE-2025-27538 · CVE-2025-27571 · CVE-2025-27936 · CVE-2025-30206 · CVE-2025-31363 · CVE-2025-32093 · CVE-2025-32431 · CVE-2025-32445 · CVE-2025-32793 · CVE-2025-32963 · CVE-2025-3801 · CVE-2025-43970 · CVE-2025-43971 · CVE-2025-43972 · CVE-2025-43973

WID-SEC-W-2025-0578: Mattermost Plugins: Schwachstelle ermöglicht Offenlegung von Daten

CVE-2025-27936

Source published: Apr 16, 2025, 9:14:55 AM (timezone not stated)
Source modified: Apr 16, 2025, 2:32:45 PM (timezone not stated)
Saved here: 15 Nov 2026 03:39:55 UTC
Source terms: ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

Source: euvd · ENISA EUVD · source terms and attribution apply. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

EUVD CVSS 3.1 · 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

nvd · CVE-2025-27936

Published

Additional publisher context

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-208

Original publisher date fields

published: 2025-04-16T10:15:14.797

lastModified: 2026-06-17T09:04:25.247

2 source CPE criteria · context only

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:*:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published: 16 Apr 2025 10:15:14 UTC
Source modified: 17 Jun 2026 09:04:25 UTC
Saved here: 25 Oct 2026 02:24:42 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

Source: nvd · NIST NVD usage terms; underlying source attribution retained. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS 3.1 · [email protected] · Secondary · 5.3 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS 3.1 · [email protected] · Primary · 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

osv · GHSA-2j87-p623-8cc2

Published

Source published: 16 Apr 2025 12:31:19 UTC
Source modified: 10 Sep 2026 03:50:56 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Publisher rating · MODERATE

osv · GO-2025-3618

Published

Mattermost vulnerable to Observable Timing Discrepancy in github.com/mattermost/mattermost-plugin-msteams. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost-plugin-msteams before v2.1.0.

Source published: 22 Apr 2025 16:56:33 UTC
Source modified: 4 Feb 2026 03:57:14 UTC
Saved here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · OSV · upstream source license applies. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.