CVE-2025-59480Network attack vector

Session credential theft via unverified SSO redirects

Published Nov 13, 2025 · Updated Nov 13, 2025

Cross-site request forgery in Mattermost Mobile Apps 2.32.0 and earlier allows attackers to steal user session credentials via SSO redirects. The SSO redirect handler accepts token-in-URL responses without verifying that the token originated from the trusted Mattermost server. Exploitation requires user interaction with a malicious Mattermost instance or an on-path response, exposing the session credential without reported integrity or availability impact.

CVSS severity6.1
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site request forgery in Mattermost Mobile Apps 2.32.0 and earlier allows attackers to steal user session credentials via SSO redirects. The SSO redirect handler accepts token-in-URL responses without verifying that the token originated from the trusted Mattermost server. Exploitation requires user interaction with a malicious Mattermost instance or an on-path response, exposing the session credential without reported integrity or availability impact.

The record

CVE
CVE-2025-59480
Published
Nov 13, 2025
Updated
Nov 13, 2025
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-352, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 13, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2.32.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mattermost · Mattermostversion=0 <=2.32.0

Published CVSS scores

6.1Mattermost, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-352Cross-Site Request Forgery (CSRF)
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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