What is the CVSS score of CVE-2025-53857?

CVE-2025-53857 has a CVSS 3.1 base score of 3.7 (Low). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Confluence are affected by CVE-2025-53857?

CVE-2025-53857 is a low-severity vulnerability involving missing authorization (CVSS 3.7).. A patch is available.

How to fix or mitigate CVE-2025-53857?

During next maintenance window: Apply vendor patches when convenient. Monitor vendor channels for updates.

Confluence CVE-2025-53857

LOW

Missing Authorization (CWE-862)

2025-08-11 responsibledisclosure@mattermost.com

Authentication Bypass Atlassian Confluence

3.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

3.7 LOW

AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 28, 2026 - 19:06 vuln.today

CVE Published

Aug 11, 2025 - 19:15 nvd

LOW 3.7

DescriptionCVE.org

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the GET autocomplete/GetChannelSubscriptions endpoint.

AnalysisAI

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via. Rated low severity (CVSS 3.7), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to get channel subscription details without proper access to the channel via API call to the GET autocomplete/GetChannelSubscriptions endpoint. Affected products include: Mattermost Confluence.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.