What’s Vulnerable › Vulnerabilities

CVE-2025-59480: Inadequate validation of SSO redirect credentials permits credential theft

• Severity: medium (CVSS 6.5 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: 2025-11-13 · updated 2026-10-19
• Weakness: CWE-352

Description

Mattermost Mobile Apps versions <=2.32.0 fail to verify that SSO redirect tokens originate from the trusted server, which allows a malicious Mattermost instance or on-path attacker to obtain user session credentials via crafted token-in-URL responses

Affected products

• Mattermost Mobile: before 2.33.0 — fixed in 2.33.0

How to fix

Upgrade to a fixed version: Mattermost Mobile 2.33.0. Check the vendor advisory for mitigations.

References

• https://mattermost.com/security-updates

Get alerted when CVE-2025-59480 or the next vulnerability affects your stack