CVE-2024-39839
published 2024-08-01CVE-2024-39839: Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared…
PriorityP424medium4.3CVSS 3.1
AVNACLPRLUINSUCNILAN
EPSS
0.34%
26.3th percentile
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
Affected
16 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 9.5.0+incompatible < 9.5.7+incompatible | 9.5.7+incompatible |
| github.com | mattermost_mattermost-server | >= 9.7.0+incompatible < 9.7.6+incompatible | 9.7.6+incompatible |
| github.com | mattermost_mattermost-server | >= 9.8.0+incompatible < 9.8.2+incompatible | 9.8.2+incompatible |
| github.com | mattermost_mattermost-server | >= 9.9.0+incompatible < 9.9.1+incompatible | 9.9.1+incompatible |
| github.com | mattermost_mattermost_server_v8 | >= 9.5.0 < 9.5.7 | 9.5.7 |
| github.com | mattermost_mattermost_server_v8 | >= 9.7.0 < 9.7.6 | 9.7.6 |
| github.com | mattermost_mattermost_server_v8 | >= 9.8.0 < 9.8.2 | 9.8.2 |
| github.com | mattermost_mattermost_server_v8 | >= 9.9.0 < 9.9.1 | 9.9.1 |
| mattermost | mattermost | — | — |
| mattermost | mattermost | 9.5.0 – 9.5.6 | — |
| mattermost | mattermost | 9.7.0 – 9.7.5 | — |
| mattermost | mattermost | 9.8.0 – 9.8.1 | — |
| mattermost | mattermost_server | — | — |
| mattermost | mattermost_server | >= 9.5.0 < 9.5.7 | 9.5.7 |
| mattermost | mattermost_server | >= 9.7.0 < 9.7.6 | 9.7.6 |
| mattermost | mattermost_server | >= 9.8.0 < 9.8.2 | 9.8.2 |
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 allows a user on a remote to set their remote username prop to an arbitrary string in github.com/mattermost/mattermost-server
osv·2024-08-06
CVE-2024-39839 Mattermost allows a user on a remote to set their remote username prop to an arbitrary string in github.com/mattermost/mattermost-server
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string in github.com/mattermost/mattermost-server
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string in github.com/mattermost/mattermost-server
OSV
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
osv·2024-08-01
CVE-2024-39839 [MEDIUM] Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
GHSA
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
ghsa·2024-08-01
CVE-2024-39839 [MEDIUM] CWE-284 Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
Mattermost allows a user on a remote to set their remote username prop to an arbitrary string
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-08-01
Published