CVE-2025-14273Network attack vector

Unauthenticated Jira request forgery via user ID spoofing

Published Dec 22, 2025 · Updated Dec 22, 2025

Authentication bypass in Mattermost with Jira plugin 4.4.0 and earlier allows remote attackers to send authenticated Jira requests. The Jira post-action handlers trusted the user ID supplied in JSON payloads instead of the authenticated request header and accepted issue keys as unrestricted paths. Exploitation requires the plugin to be enabled and knowledge of a valid user ID, letting the attacker act through the spoofed user's Jira connection.

CVSS severity7.2
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authentication bypass in Mattermost with Jira plugin 4.4.0 and earlier allows remote attackers to send authenticated Jira requests. The Jira post-action handlers trusted the user ID supplied in JSON payloads instead of the authenticated request header and accepted issue keys as unrestricted paths. Exploitation requires the plugin to be enabled and knowledge of a valid user ID, letting the attacker act through the spoofed user's Jira connection.

The record

CVE
CVE-2025-14273
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-303, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.11.0 <=10.11.7
  2. Affected versionversion=10.12.0 <=10.12.3
  3. Affected versionversion=11.0.0 <=11.0.5
  4. Affected versionversion=11.1.0 <=11.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mattermost · Mattermostversion=10.11.0 <=10.11.7; version=10.12.0 <=10.12.3; version=11.0.0 <=11.0.5; version=11.1.0 <=11.1.0

Published CVSS scores

8.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
7.2Mattermost, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-303Incorrect Implementation of Authentication Algorithm
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo