vulnwire
4.3med

CVE-2017-18878

Mattermost Server allows users with a session ID to revoke another users' session

Also known as GHSA-h564-6gc2-fcc6, GO-2025-4191

Published 6 y ago · modified 4 mo ago · JSON

CVSS
4.3
v3.1 · NVD
CISA KEV
No
not known exploited
EPSS
0.8%
percentile 56%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

0.78% probability of exploitation in the next 30 days, higher than 56% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.14.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD2.04.0AV:N/AC:L/Au:S/C:N/I:N/A:P
GitHub3.14.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Affected packages

EcosystemPackageAffectedFixed in
gogithub.com/mattermost/mattermost-server
<4.1.2-0.20171004201910-6be8113eb60c
>=4.2.0-rc1, <4.2.1-0.20171004192657-8fbbd688ea24
>=4.3.0-rc1, <4.3.0
>=4.3.0-rc1+incompatible, <4.3.0+incompatible
4.1.2-0.20171004201910-6be8113eb60c
4.2.1-0.20171004192657-8fbbd688ea24
4.3.0
4.3.0+incompatible

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource
  • CWE-284 Improper Access Control
  • CWE-639 Authorization Bypass Through User-Controlled Key

References

  • mattermost.com /security-updates/ · x_refsource_CONFIRM, x_transferred
  • nvd.nist.gov /vuln/detail/CVE-2017-18878 · advisory
  • github.com /mattermost/mattermost/commit/6be8113eb60cf5ddd2dc1c3f4db05cae0c183086 · web
  • github.com /mattermost/mattermost/commit/8fbbd688ea2466dd0d70e9c07e9703d78f8a19a5 · web
  • github.com /mattermost/mattermost/commit/affd35071ea155069979fd359726296de8aa6aaf · web
  • github.com /mattermost/mattermost · package
  • mattermost.com /security-updates · web
  • github.com /advisories/GHSA-h564-6gc2-fcc6 · advisory

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.