Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-22880— Mobile SSO authentication flow allows credential theft via malicious server

Quick assessment

Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mattermost Mobile Apps是美国Mattermost公司的一款消息传递移动应用程序。 Mattermost Mobile Apps 2.0.37及之前版本、11.0.4及之前版本、11.1.3及之前版本、11.3.2及之前版本和10.11.11.0及之前版本存在跨站请求伪造漏洞，该漏洞源于未正确验证SSO身份验证回调来源，可能导致攻击者窃取用户凭据。

CVSS 6.1 · Medium EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 12

VendorProduct Version RangeStatus
Mattermost Mattermost ≤ 2.0.37 affected
≤ 11.0.4 affected
≤ 11.1.3 affected
≤ 11.3.2 affected
≤ 10.11.11 affected
2.38.0 unaffected
11.5.0 unaffected
2.37.1.0 unaffected
… +4 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-22880

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Mobile SSO authentication flow allows credential theft via malicious server
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost Mobile Apps versions <=2.37 11.4 2.0.37 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to properly validate the SSO authentication callback origin which allows an attacker controlling a malicious Mattermost server to steal user credentials for a legitimate Mattermost server via relaying the SSO code exchange flow through the mobile application. Mattermost Advisory ID: MMSA-2025-00564
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost Mobile Apps 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Mobile Apps是美国Mattermost公司的一款消息传递移动应用程序。 Mattermost Mobile Apps 2.0.37及之前版本、11.0.4及之前版本、11.1.3及之前版本、11.3.2及之前版本和10.11.11.0及之前版本存在跨站请求伪造漏洞，该漏洞源于未正确验证SSO身份验证回调来源，可能导致攻击者窃取用户凭据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Mattermost Mattermost 0 ~ 2.0.37 -

II. Public POCs for CVE-2026-22880

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-22880

请登录查看更多情报信息。

Same Patch Batch · Mattermost · 2026-05-21 · 3 CVEs total

CVE-2026-4858 8.0 HIGH Path traversal in integration action URL leading to arbitrary API execution via system adm
CVE-2026-4055 4.3 MEDIUM Insufficient permission validation on cross-team playbook run creation

IV. Related Vulnerabilities

Same product: Mattermost
Same vendor: Mattermost
Same weakness: CWE-352

V. Comments for CVE-2026-22880

No comments yet

Leave a comment