CVE-2025-24866· NVD / CVE Program· CNA Mattermost

Unauthorized Access to User Activity Logs API by delegated granular administration roles

Mattermost versions 9.11.x <= 9.11.8 fail to enforce proper access controls on the /api/v4/audits endpoint, allowing users with delegated granular administration roles who lack access to Compliance Monitoring to retrieve User Activity Logs.

LowCVSS 2.7 · v3.1—No exploit Fix available

Broken access control (IDOR)

Noroxi analysis

No Noroxi analysis for this record yet

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Published: Apr 10, 2025
Updated: Jun 17, 2026
EPSS: 0.3% · 19th percentile
CWE: CWE-863

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Action score

Monitor

Low priority for now.

CVSS: 10 / 40 · 2.7 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Mattermost: 2.7; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

Vendor	Product	CPE
mattermost	mattermost server	cpe:2.3:a:mattermost:mattermost_server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

mattermost mattermost server9.11.0 and later · before 9.11.9

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Mattermost). Independent of NVD's CPE analysis and usually ahead of it.

Mattermost Mattermost
- 10.5.0, 9.11.9not affected
- 9.11.0 and later · up to and including 9.11.8affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Go	github.com/mattermost/mattermost-server	from 9.11.0+incompatible · before 9.11.9+incompatible	9.11.9+incompatible
Go	github.com/mattermost/mattermost-server/v5	all versions	—
Go	github.com/mattermost/mattermost-server/v6	all versions	—
Go	github.com/mattermost/mattermost/server/v8	from 9.11.0 · before 9.11.9	9.11.9
Go	github.com/mattermost/mattermost/server/v8	before 8.0.0-20250204211032-f52e08754c49	8.0.0-20250204211032-f52e08754c49
Go	github.com/mattermost/mattermost/server/v8	all versions	—
openSUSE:Tumbleweed	govulncheck-vulndb	before 0.0.20250422T181640-1.1	0.0.20250422T181640-1.1

Same product

mattermost: all records

Other highest-scoring records for the same primary product.

CVE-2026-4858Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.
39Monitor
CVE-2025-12421Account Takeover via Code Exchange Endpoint
39Monitor
CVE-2025-12419Account takeover on OAuth/OpenID-enabled servers
39Monitor
CVE-2025-4981Path Traversal Leading to RCE by Any Authenticated Mattermost User
39Monitor
CVE-2023-6458Client side path traversal due to lack of route parameters validation
39Monitor
CVE-2017-18920An issue was discovered in Mattermost Server before 3.6.2.
39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Go:github.com/mattermost/mattermost-server	9.11.9+incompatible	Package registry (OSV)
Go:github.com/mattermost/mattermost/server/v8	8.0.0-20250204211032-f52e08754c49	Package registry (OSV)
Go:github.com/mattermost/mattermost/server/v8	9.11.9	Package registry (OSV)
opensuse:govulncheck-vulndb	0.0.20250422T181640-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

BasilJawanfinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2025-2527420 days apartUnauthorized Command Execution in Archived Channels
35Monitor
CVE-2026-7387428 days apartMattermost group syncable endpoints allow privilege escalation via scheme_admin
35Monitor
CVE-2026-9816494 days apartInsufficient server-side validation of board member role fields permits privilege escalation
33Monitor
CVE-2026-6739428 days apartMattermost: Delegated admins could patch protected default system roles
28Monitor
CVE-2025-3017920 days apartMFA Enforcement Bypass in Search APIs
26Monitor
CVE-2026-2462340 days apartAdmin RCE via Malicious Plugin Upload on CI Test Instances
26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope