CVE-2025-9072 — Open Redirect in Mattermost Mattermost-server

CWE-601 — Open RedirectCWE-770 — Allocation of Resources Without Limits or Throttling6 documents5 sources
Severity
5.4MEDIUMNVD
CNA7.6
EPSS
0.0%
top 90.75%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedSep 15
Latest updateSep 17

Description

Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NExploitability: 2.3 | Impact: 2.7

Affected Packages4 packages

▶NVDmattermost/mattermost_server10.5.0 — 10.5.10+2
▶Gogithub.com/mattermost_mattermost-server10.5.0+incompatible — 10.5.10+incompatible+5
▶Gogithub.com/mattermost_mattermost_server_v8< 8.0.0-20250731063404-9eebaadf8f72
▶CVEListV5mattermost/mattermost10.10.0 — 10.10.1+2

🔴Vulnerability Details

4
OSV
Mattermost Open Redirect vulnerability in github.com/mattermost/mattermost-server↗2025-09-17
▶
CVEList
One-Click Mattermost Account Takeover via Poisoned RelayState SAML Parameter↗2025-09-15
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OSV
Mattermost Open Redirect vulnerability↗2025-09-15
▶
GHSA
Mattermost Open Redirect vulnerability↗2025-09-15
▶

📋Vendor Advisories

1
Microsoft
An issue was discovered in the Binary File Descriptor (BFD) library (aka libbfd) as distributed in GNU Binutils 2.32. It is an attempted excessive memory allocation in setup_group in elf.c.↗2019-02-12
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CVE-2025-9072 — Open Redirect | cvebase