CVE-2024-1402 json
Denial of service in mattermost mobile apps and server via emoji reactions
published 2024-02-09 2 y ago modified 2026-09-10 1 mo ago also BIT-mattermost-2024-1402 , EUVD-2024-0474 , GHSA-32h7-7j94-8fc2 , GO-2024-2541
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 44%
- public exploits
- 0
- none known
Summary
Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
Patch / fix
- go github.com/mattermost/mattermost/server/v8 8.1.8, 9.1.5, 9.2.4
- bitnami mattermost 9.6.1
- go github.com/mattermost/mattermost-server 9.1.5+incompatible, 9.2.4+incompatible
- Mattermost Mattermost 8.1.8, 9.1.5, 9.2.4, 9.3.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
| OSV | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | <8.1.8 >=9.2.0, <9.2.4 >=9.1.0, <9.1.5 all versions |
8.1.8 9.2.4 9.1.5 |
| bitnami | mattermost | <9.6.1 |
9.6.1 |
| go | github.com/mattermost/mattermost-server | >=9.1.0+incompatible, <9.1.5+incompatible >=9.2.0+incompatible, <9.2.4+incompatible |
9.1.5+incompatible 9.2.4+incompatible |
| 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-400 Uncontrolled Resource Consumption
References
-
github.com
/mattermost/mattermost/commit/64cb0ca8af2dbda1afcddd1604460591a4799b81
web
-
github.com
/mattermost/mattermost/commit/6d2440de9fd774b67e65e3aac4ab8b6ef9aba2d8
web
-
github.com
/mattermost/mattermost/commit/81190e2da128a6985914ea7023a69ac400513fc4
web
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2024-1402
advisory, web
-
github.com
/mattermost/mattermost
package
-
github.com
/advisories/GHSA-32h7-7j94-8fc2
advisory
Sources
- CVE List CVE-2024-1402
- GitHub Advisory GHSA-32h7-7j94-8fc2
- NVD CVE-2024-1402
- OSV BIT-mattermost-2024-1402
- OSV GO-2024-2541
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