CVE-2017-18872
published 2020-06-19CVE-2017-18872: An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0…
PriorityP417medium4.3CVSS 3.1
AVNACLPRLUINSUCNILAN
EPSS
0.56%
43.5th percentile
An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 0 < 4.3.3 | 4.3.3 |
| github.com | mattermost_mattermost-server | >= 0 < 4.3.3+incompatible | 4.3.3+incompatible |
| github.com | mattermost_mattermost-server | >= 4.4.0-rc1 < 4.4.3 | 4.4.3 |
| github.com | mattermost_mattermost-server | >= 4.4.0-rc1+incompatible < 4.4.3+incompatible | 4.4.3+incompatible |
| mattermost | mattermost_server | < 4.3.3 | 4.3.3 |
| mattermost | mattermost_server | >= 4.4.0 < 4.4.3 | 4.4.3 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
nvdv2.03.5LOWAV:N/AC:M/Au:S/C:N/I:P/A:N
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 Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server
osv·2025-10-30
CVE-2017-18872 Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization in github.com/mattermost/mattermost-server
GHSA
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
ghsa·2022-05-24
CVE-2017-18872 [MEDIUM] CWE-862 Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.
OSV
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
osv·2022-05-24
CVE-2017-18872 [MEDIUM] Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
Mattermost Server's OAuth 2.0 service is vulnerable to attack through Missing Authorization
An issue was discovered in Mattermost Server before 4.4.3 and 4.3.3. Attackers could reconfigure an OAuth app in some cases where Mattermost is an OAuth 2.0 service provider.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-06-19
Published