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🛡️ CVE-2025-53514 — confluence

🟡 CVSS 5.9 — Medium ✅ No Known Exploit CWE-754 NVD
5.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Mattermost Confluence Plugin has Improper Check for Unusual or Exceptional Conditions

Mattermost Confluence Plugin versions < 1.5.0 fail to handle unexpected request bodies, allow\ing attackers to crash the plugin via constant hits to the server webhook endpoint with an invalid request body.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: None.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2025-53514 is classified as CWE-754: Improper Check for Unusual or Exceptional Conditions. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

Affected software

CVE-2025-53514 is recorded against 2 packages.

  • confluence (fixed in 1.5.0)
  • github.com/mattermost/mattermost-plugin-confluence

Timeline and source

Published on 11 August 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

mattermost.com

Other advisories for this package

confluence has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-754: Improper Check for Unusual or Exceptional Conditions) in other software:

Details

Severity MEDIUM
CVSS Score 5.9
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE CWE-754
Public Exploit ✅ No
Source NVD
Published 2025-08-11
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
confluence — 1.5.0
github.com/mattermost/mattermost-plugin-confluence — —

References

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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