CVE-2025-55073 json
MS Teams plugin OAuth allows editing arbitrary posts
published 2025-11-14 11 mo ago modified 2026-10-19 20 d ago also GHSA-ff85-qw3h-g9vp , GO-2025-4129 , EUVD-2025-186555
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 9%
- public exploits
- 0
- none known
Summary
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.
Patch / fix
- go github.com/mattermost/mattermost-server 10.5.12, 10.5.12+incompatible, 10.11.4, 10.11.4+incompatible, 10.12.1, 10.12.1+incompatible
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250929212932-a41db04d2746
- Mattermost Mattermost 10.5.12, 10.11.4, 10.12.1, 11.0.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | >=10.11.0, <10.11.4 >=10.5.0, <10.5.12 >=10.12.0, <10.12.1 >=10.5.0+incompatible, <10.5.12+incompatible >=10.11.0+incompatible, <10.11.4+incompatible >=10.12.0+incompatible, <10.12.1+incompatible |
10.11.4 10.5.12 10.12.1 10.5.12+incompatible 10.11.4+incompatible 10.12.1+incompatible |
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250929212932-a41db04d2746 |
8.0.0-20250929212932-a41db04d2746 |
| go | github.com/mattermost/mattermost-server/v5 | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-306 Missing Authentication for Critical Functionality
References
-
github.com
/mattermost/mattermost/commit/375ce229f4923205394d8f27925372b2cbf28130
web
-
github.com
/mattermost/mattermost/commit/6c288aa62bb3343183ec1d0a06360d14aa0193e9
web
-
github.com
/mattermost/mattermost/commit/a41db04d2746ab549d056db4ede4cd803f64989c
web
-
github.com
/mattermost/mattermost/commit/b822cea06bf5683a176e2c92711241bd29cd9389
web
-
github.com
/mattermost/mattermost/commit/e47349ea0fc072ee1dfb196d9bb1c8fd1a589224
web
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-55073
advisory
-
github.com
/mattermost/mattermost
package
-
github.com
/advisories/GHSA-ff85-qw3h-g9vp
advisory
Sources
- CVE List CVE-2025-55073
- GitHub Advisory GHSA-ff85-qw3h-g9vp
- NVD CVE-2025-55073
- OSV GO-2025-4129
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