Privilege escalation to system admin via personal access tokens

published 2023-05-12 3 y ago modified 2026-06-17 4 mo ago also BIT-mattermost-2023-2515 , EUVD-2023-1492 , GHSA-7g2v-2frm-rg94

cvss: 4.7; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.5%; EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits: 0; none known

Mattermost fails to restrict a user with permissions to edit other users and to create personal access tokens from elevating their privileges to system admin

Patch / fix

fixed in 3

go github.com/mattermost/mattermost-server/v6 7.1.8, 7.7.4, 7.8.3, 7.9.2
bitnami mattermost 7.1.8, 7.7.4, 7.8.3, 7.9.2
Mattermost Mattermost 7.1.8, 7.7.4, 7.8.3, 7.9.2

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 23 mo ago (2024-12-06)

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.7	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
GitHub	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
OSV	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
go	github.com/mattermost/mattermost-server/v6	<7.1.8 >=7.2.0, <7.7.4 >=7.8.0, <7.8.3 >=7.9.0, <7.9.2	7.1.8 7.7.4 7.8.3 7.9.2
bitnami	mattermost	<7.1.8 >=7.2.0, <7.7.4 >=7.8.0, <7.8.3 >=7.9.0, <7.9.2	7.1.8 7.7.4 7.8.3 7.9.2

Affected products

Mattermost Mattermost

Classification

Weakness

CWE-863 Incorrect Authorization

References

mattermost.com /security-updates
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2023-2515
advisory, web
github.com /mattermost/mattermost-server
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary