CVE-2017-18878
published 2020-06-19CVE-2017-18878: An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.
PriorityP418medium4.3CVSS 3.1
AVNACLPRLUINSUCNINAL
EPSS
0.77%
51.8th percentile
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | mattermost_mattermost-server | >= 0 < 4.1.2-0.20171004201910-6be8113eb60c | 4.1.2-0.20171004201910-6be8113eb60c |
| github.com | mattermost_mattermost-server | >= 4.2.0-rc1 < 4.2.1-0.20171004192657-8fbbd688ea24 | 4.2.1-0.20171004192657-8fbbd688ea24 |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1 < 4.3.0 | 4.3.0 |
| github.com | mattermost_mattermost-server | >= 4.3.0-rc1+incompatible < 4.3.0+incompatible | 4.3.0+incompatible |
| mattermost | mattermost_server | < 4.1.2 | 4.1.2 |
| mattermost | mattermost_server | — | — |
| mattermost | mattermost_server | >= 4.2.0 < 4.2.1 | 4.2.1 |
CVSS provenance
nvdv3.14.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P
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OSV
Mattermost Server allows users with a session ID to revoke another users' session in github.com/mattermost/mattermost-server
osv·2025-12-15
CVE-2017-18878 Mattermost Server allows users with a session ID to revoke another users' session in github.com/mattermost/mattermost-server
Mattermost Server allows users with a session ID to revoke another users' session in github.com/mattermost/mattermost-server
Mattermost Server allows users with a session ID to revoke another users' session in github.com/mattermost/mattermost-server.
NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.
(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)
The additional affected modules and versions are: github.com/mattermost/mattermost-server before v4.1.2-0.20171004201910-6be8113eb60c, before v4.2.1-0.20171004192657-8fbbd688ea24.
GHSA
Mattermost Server allows users with a session ID to revoke another users' session
ghsa·2022-05-24
CVE-2017-18878 [MEDIUM] CWE-284 Mattermost Server allows users with a session ID to revoke another users' session
Mattermost Server allows users with a session ID to revoke another users' session
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.
OSV
Mattermost Server allows users with a session ID to revoke another users' session
osv·2022-05-24
CVE-2017-18878 [MEDIUM] Mattermost Server allows users with a session ID to revoke another users' session
Mattermost Server allows users with a session ID to revoke another users' session
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. Knowledge of a session ID allows revoking another user's session.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-06-19
Published