CVE-2025-27936

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2025-27936
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27936.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-27936
Aliases
Downstream
Related
Published
2025-04-16T09:14:55.095Z
Modified
2026-07-08T08:12:02.470332466Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Webhook Secret Exposure via Timing attack in MSteams plugin
Details

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.

Database specific 
{
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "10.5.0"
                },
                {
                    "last_affected": "10.5.1"
                }
            ]
        }
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27936.json",
    "cna_assigner": "Mattermost",
    "cwe_ids": [
        "CWE-208"
    ]
}
References

Affected packages

Git / github.com/mattermost/mattermost

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/mattermost
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
09ccf277a61f68bdbf2453c987af463ed29d6376
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "10.5.2"
        }
    ]
}

Affected versions

@mattermost/client@10.*
@mattermost/client@10.5.0
@mattermost/types@10.*
@mattermost/types@10.5.0
Other
cloud-2022-07-20-1
cloud-2022-08-10-1
cloud-2022-09-08-1
cloud-2022-10-06-1
cloud-2022-11-11-1
cloud-2022-11-24-1
server/public/v0.*
server/public/v0.0.10
server/public/v0.0.11
server/public/v0.0.12
server/public/v0.0.13
server/public/v0.0.14
server/public/v0.0.15
server/public/v0.0.16
server/public/v0.0.17
server/public/v0.0.18
server/public/v0.0.5
server/public/v0.0.6
server/public/v0.0.7
server/public/v0.0.8
server/public/v0.0.9
server/public/v0.1.0
server/public/v0.1.1
server/public/v0.1.2
server/public/v0.1.3
server/public/v0.1.4
server/public/v0.1.5
server/public/v0.1.6
server/public/v0.1.7
server/public/v0.1.8
server/public/v0.1.9
v0.*
v0.5.0
v10.*
v10.5.0
v10.5.0-rc1
v10.5.0-rc2
v10.5.0-rc3
v10.5.0-rc4
v10.5.0-rc5
v10.5.0-rc6
v10.5.1
v10.5.1-rc1
v10.5.1-rc2
v4.*
v4.10.0-rc1
v4.2.0-rc1
v4.3.0-rc1
v4.4.0-rc1
v4.5.0-rc1
v4.6.0-rc1
v4.6.0-rc2
v4.7.0-rc1
v4.8.0-rc1
v4.9.0-rc1
v5.*
v5.0.0-rc1
v5.1.0-rc1
v5.2.0-rc1
v5.2.0-rc2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27936.json"

Git / github.com/mattermost/mattermost-plugin-msteams

Affected ranges

Type
GIT
Repo
https://github.com/mattermost/mattermost-plugin-msteams
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
4a29bb104ccb81ab2212d08f5c0b7a57152d3db9
Database specific 
{
    "source": "CPE_RANGE",
    "cpe": "cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.1.0"
        }
    ]
}

Affected versions

0.*
0.0.1-alpha
v0.*
v0.0.1
v0.2.0
v0.3.0
v0.3.1
v0.3.10
v0.3.12
v0.3.13
v0.3.2
v0.3.3
v0.3.4
v0.3.5
v0.3.6
v0.3.7
v0.3.8
v0.3.9
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.0.3
v1.0.4
v1.0.5
v1.0.6
v1.0.7
v1.0.8
v1.1.0
v1.10.0
v1.10.1
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.2.0
v1.3.0
v1.3.1
v1.4.0
v1.4.0-rc1
v1.5.0
v1.5.1
v1.5.2
v1.5.3
v1.6.0
v1.6.1
v1.7.0
v1.8.0
v1.8.1
v1.8.2
v1.9.0
v1.9.1
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27936.json"