CVE-2022-3257 json
Server-side Denial of Service while processing a specifically crafted GIF file
published 4y ago modified 4mo ago also BIT-mattermost-2022-3257 , EUVD-2022-6874 , GHSA-m7w4-q5vg-5xfp
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
Mattermost version 7.1.x and earlier fails to sufficiently process a specifically crafted GIF file when it is uploaded while drafting a post, which allows authenticated users to cause resource exhaustion while processing the file, resulting in server-side Denial of Service.
Patch / fix
- go github.com/mattermost/mattermost-server/v6 7.2.0
- bitnami mattermost 7.2.0
- mattermost mattermost_server 7.2.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- hackerone.com https://hackerone.com/reports/1620170 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server/v6 | >=7.1.0, <7.2.0 |
7.2.0 |
| bitnami | mattermost | <7.2.0 |
7.2.0 |
Affected products
- Mattermost Mattermost
Classification
References
-
hackerone.com
/reports/1620170
web, exploit, third-party-advisory
-
mattermost.com
/security-updates/
vendor-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2022-3257
advisory, web
-
github.com
/mattermost/mattermost-server
package
-
mattermost.com
/security-updates
web
Sources
- CVE List CVE-2022-3257
- GitHub Advisory GHSA-m7w4-q5vg-5xfp
- NVD CVE-2022-3257
- OSV BIT-mattermost-2022-3257
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.