Password hash in response body after username update

published 2023-11-06 3 y ago modified 2026-06-17 4 mo ago also GHSA-r67m-mf7v-qp7j , EUVD-2023-3022

cvss: 4.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits: 0; none known

Mattermost fails to properly sanitize the user object when updating the username, resulting in the password hash being included in the response body.

Patch / fix

fixed in 5 links 3

go github.com/mattermost/mattermost-server/v6 5.3.2-0.20230825233148-f787fd63368a, 7.8.12
go github.com/mattermost/mattermost/server/v8 8.0.0-20230825233148-f787fd63368a, 8.0.4, 8.1.3, 9.0.1
go github.com/mattermost/mattermost-server/v5 5.3.2-0.20230825233148-f787fd63368a
go github.com/mattermost/mattermost-server 5.3.2-0.20230825233148-f787fd63368a
Mattermost Mattermost 7.8.12, 8.0.4, 8.1.3, 9.0.1

github.com/mattermost/mattermost@698f4a9 commit
github.com/mattermost/mattermost#24362 pull request
github.com/mattermost/mattermost#24566 pull request

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-04)

Exploit prediction

0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/mattermost/mattermost-server/v6	>=5.4.0-rc1, <7.8.12 <5.3.2-0.20230825233148-f787fd63368a	7.8.12 5.3.2-0.20230825233148-f787fd63368a
go	github.com/mattermost/mattermost/server/v8	>=8.0.0, <8.0.4 >=8.1.0, <8.1.3 >=9.0.0, <9.0.1 <8.0.0-20230825233148-f787fd63368a	8.0.4 8.1.3 9.0.1 8.0.0-20230825233148-f787fd63368a
go	github.com/mattermost/mattermost-server/v5	<5.3.2-0.20230825233148-f787fd63368a	5.3.2-0.20230825233148-f787fd63368a
go	github.com/mattermost/mattermost-server	<5.3.2-0.20230825233148-f787fd63368a	5.3.2-0.20230825233148-f787fd63368a

Affected products

Mattermost Mattermost

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-116 Improper Encoding or Escaping of Output

References

github.com /mattermost/mattermost/pull/24362
web
github.com /mattermost/mattermost/pull/24566
web
github.com /mattermost/mattermost/commit/698f4a97da564e2c1f2bf1fbd01755cefa3b7881
web
mattermost.com /security-updates
web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2023-5968
advisory
github.com /mattermost/mattermost
package

Sources

CVE List CVE-2023-5968
GitHub Advisory GHSA-r67m-mf7v-qp7j
NVD CVE-2023-5968

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