CVE-2024-45843: Weak SSRF Filtering

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-09-26 · updated 2026-06-17
Weakness: CWE-918

Description

Mattermost versions 9.5.x <= 9.5.8 fail to include the metadata endpoints of Oracle Cloud and Alibaba in the SSRF denylist, which allows an attacker to possibly cause an SSRF if Mattermost was deployed in Oracle Cloud or Alibaba.

Affected products

Mattermost: from 9.5.0 before 9.5.9 — fixed in 9.5.9

How to fix

Upgrade to a fixed version: Mattermost 9.5.9. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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