CVE-2025-44004: Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost ins

Q: How do I fix CVE-2025-44004?

confluence: upgrade to 1.5.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-44004 being exploited?

CVE-2025-44004 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-44004 affect?

CVE-2025-44004 affects confluence. Severity is high (CVSS 7.2). Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subs

Q: How urgent is CVE-2025-44004?

Priority 33/100. High severity; Remotely exploitable, no login, no user action

Routine

HIGH 7.2REMOTEUPGRADE

CVE-2025-44004 is a high-severity flaw (CVSS 7.2) affecting confluence. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subscription endpoint.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-306
Published	2025-08-11
Last modified	2026-06-17

Publisher (CNA): Mattermost, Inc. · Vendor: mattermost

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-08-11 19:15 UTCPublished CVE record published
2026-06-17 09:24 UTCUpdated Record last modified

mattermost confluence UPGRADE

Affected: < 1.5.0

Fixed in: 1.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy confluence || rpm -q confluence || confluence --version

2. UPGRADE to 1.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade confluence

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade confluence

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-44004?

confluence: upgrade to 1.5.0. Exact commands for each OS are on this page.

Is CVE-2025-44004 being exploited?

CVE-2025-44004 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-44004 affect?

CVE-2025-44004 affects confluence. Severity is high (CVSS 7.2). Mattermost Confluence Plugin version <1.5.0 fails to check the authorization of the user to the Mattermost instance which allows attackers to create a channel subscription without proper authorization via API call to the create channel subs

How urgent is CVE-2025-44004?

Priority 33/100. High severity; Remotely exploitable, no login, no user action

Software pages

Atlassian Confluence vulnerabilities · Mattermost vulnerabilities

Related CVEs

CVE-2025-8285 MEDIUM 4.0 UPGRADE Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows
CVE-2025-54525 HIGH 7.5 UPGRADE Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to
CVE-2025-54478 HIGH 7.2 UPGRADE Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost inst
CVE-2025-54463 MEDIUM 5.9 UPGRADE Mattermost Confluence Plugin version <1.5.0 fails to handle unexpected request body which allows attackers to
CVE-2025-54458 MEDIUM 5.0 UPGRADE Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space whic

References

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