CVE-2025-49221 | Unauthenticated Access to Channel Subscription in Mattermost Confluence Plugin

Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to access subscription details without via API call to GET subscription endpoint.

Published: 2025-08-11 Last update: 2025-09-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-49221 is rated Low Risk (20.3/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-49221

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-19 0.03% 0.05% +0.02%
2 2026-01-07 0.06% 0.03% -0.02%
3 2025-08-17 — 0.06% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-49221

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.7 3.1 LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 1.4 [email protected]

Weakness enumeration for CVE-2025-49221

GitHub Security Advisory for CVE-2025-49221

GHSA-rfg4-2m63-fw2q · Severity: low · Ecosystem: go — Mattermost Confluence Plugin has Missing Authorization vulnerability

Affected software / configurations for CVE-2025-49221

Vendor Product Version Raw CPE
mattermost confluence < 1.5.0 cpe:2.3:a:mattermost:confluence:*:*:*:*:*:*:*:*

References for CVE-2025-49221

URL Tags
https://mattermost.com/security-updates Vendor Advisory
cvelogic Threat Intelligence