Mattermost 10.5 · Version Status
Mattermost 10.5 End of Life Date
Mattermost 10.5 end-of-life date, support status, and CVE risk. Data from endoflife.date and official vendor documentation.
⚠
Mattermost 10.5 is past end of life. This version no longer receives security patches. 245 days past EOL — migrate to a supported version immediately.
EOL Date
Nov 15, 2025
245 days past EOL
Latest Release
10.5.14
LTS release
Release Date
Feb 16, 2025
Mattermost 10.5 series
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended Mattermost 10.5 support is available
Commercial vendors offer security patches beyond EOL — compare your options.
Compare Options →
| Version | Latest | EOL Date | Status |
|---|
| 6.0 |
6.0.4 |
Jan 15, 2022 |
EOL |
| 6.1 |
6.1.3 |
Feb 15, 2022 |
EOL |
| 6.2 |
6.2.5 |
Mar 15, 2022 |
EOL |
| 6.3 LTS |
6.3.10 |
Oct 15, 2022 |
EOL |
| 6.4 |
6.4.3 |
May 15, 2022 |
EOL |
| 6.5 |
6.5.2 |
Jun 15, 2022 |
EOL |
| 6.6 |
6.6.2 |
Jul 15, 2022 |
EOL |
| 6.7 |
6.7.2 |
Aug 15, 2022 |
EOL |
What does Mattermost 10.5 end of life mean?
When Mattermost 10.5 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Mattermost 10.5 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Mattermost 11.7 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Mattermost 10.5 reach end of life?
Mattermost 10.5 reached end of life on November 15, 2025. This version is no longer receiving security patches.
Is Mattermost 10.5 still supported?
No. Mattermost 10.5 reached end of life on November 15, 2025 and is no longer receiving security patches.
What should I upgrade to from Mattermost 10.5?
The recommended upgrade from Mattermost 10.5 is
Mattermost 11.7 — the latest actively supported version. Check the
Mattermost full timeline for all supported versions.
What are the security risks of running Mattermost 10.5 past EOL?
When Mattermost 10.5 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Mattermost should migrate immediately or implement compensating controls.