GHSA-h469-4fcf-p23h

ghsaUSosv

Mattermost has Potential Server Crash due to Unvalidated Import Data

view advisory published 2025-08-21Licence: CC-BY-4.0

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2025-8402US	—	0.32% (25th)	—	2025-08-21
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash th…

references

External citations — patches, advisories, analysis.

https://github.com/mattermost/mattermostPACKAGE
https://mattermost.com/security-updatesWEB
https://nvd.nist.gov/vuln/detail/CVE-2025-8402ADVISORY
https://pkg.go.dev/vuln/GO-2025-3911WEB

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