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CVE-2025-44001: Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows

22
Routine
MEDIUM 4.0REMOTEUPGRADE

CVE-2025-44001 is a medium-severity flaw (CVSS 4.0) 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 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 Channel Subscriptions details endpoint.

Why this priority

  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score4.0 (Medium)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededNone
User interactionNone
EPSS exploit chance0.2% (top 89%)
CISA exploited listNo
WeaknessCWE-862
Published2025-08-11
Last modified2026-06-17
Publisher (CNA): Mattermost, Inc. · Vendor: mattermost

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

Am I affected?

Timeline

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-2025-44001?

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

Is CVE-2025-44001 being exploited?

CVE-2025-44001 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-2025-44001 affect?

CVE-2025-44001 affects confluence. Severity is medium (CVSS 4.0). 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 Channel Subscriptions d

How urgent is CVE-2025-44001?

Priority 22/100. Remotely exploitable, no login, no user action

Software pages

Atlassian Confluence vulnerabilities · Mattermost vulnerabilities

Related CVEs

References

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