CVE-2025-8023
published 2025-08-21CVE-2025-8023: Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file…
PriorityP428medium4.9CVSS 3.1
AVNACLPRHUINSUCNIHAN
EPSS
0.41%
33.2th percentile
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
Affected
19 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 10.5.0 < 10.5.9 | 10.5.9 |
| github.com | mattermost_mattermost-server | >= 10.5.0+incompatible < 10.5.9+incompatible | 10.5.9+incompatible |
| github.com | mattermost_mattermost-server | >= 10.8.0 < 10.8.4 | 10.8.4 |
| github.com | mattermost_mattermost-server | >= 10.8.0+incompatible < 10.8.4+incompatible | 10.8.4+incompatible |
| github.com | mattermost_mattermost-server | >= 10.9.0 < 10.9.3 | 10.9.3 |
| github.com | mattermost_mattermost-server | >= 10.9.0+incompatible < 10.9.3+incompatible | 10.9.3+incompatible |
| github.com | mattermost_mattermost-server | >= 9.11.0 < 9.11.18 | 9.11.18 |
| github.com | mattermost_mattermost-server | >= 9.11.0+incompatible < 9.11.18+incompatible | 9.11.18+incompatible |
| github.com | mattermost_mattermost-server_v5 | 0 – 5.39.5 | — |
| github.com | mattermost_mattermost-server_v6 | 0 – 6.7.2 | — |
| github.com | mattermost_mattermost_server_v8 | >= 0 < 8.0.0-20250708065844-b38e2eccda18 | 8.0.0-20250708065844-b38e2eccda18 |
| mattermost | mattermost | 10.5.0 – 10.5.8 | — |
| mattermost | mattermost | 10.8.0 – 10.8.3 | — |
| mattermost | mattermost | 10.9.0 – 10.9.2 | — |
| mattermost | mattermost | 9.11.0 – 9.11.17 | — |
| mattermost | mattermost_server | >= 10.5.0 < 10.5.9 | 10.5.9 |
| mattermost | mattermost_server | >= 10.8.0 < 10.8.4 | 10.8.4 |
| mattermost | mattermost_server | >= 10.9.0 < 10.9.3 | 10.9.3 |
| mattermost | mattermost_server | >= 9.11.0 < 9.11.18 | 9.11.18 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server
osv·2025-08-29
CVE-2025-8023 Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server
Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server
Mattermost Fails to Sanitize Path Traversal Sequences in github.com/mattermost/mattermost-server
OSV
Mattermost Fails to Sanitize Path Traversal Sequences
osv·2025-08-21
CVE-2025-8023 [MEDIUM] Mattermost Fails to Sanitize Path Traversal Sequences
Mattermost Fails to Sanitize Path Traversal Sequences
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
GHSA
Mattermost Fails to Sanitize Path Traversal Sequences
ghsa·2025-08-21
CVE-2025-8023 [MEDIUM] CWE-22 Mattermost Fails to Sanitize Path Traversal Sequences
Mattermost Fails to Sanitize Path Traversal Sequences
Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2025-08-21
Published