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Fencer Vulns
medium 4.3

CVE-2023-47168 json

Open redirect in /oauth/<service>/mobile_login?redirect_to=

published 2023-11-27 2 y ago modified 2026-09-10 1 mo ago also GHSA-4ghx-8jw8-p76q , EUVD-2023-2876

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 34%
public exploits
0
none known

Summary

Mattermost fails to properly check a redirect URL parameter allowing for an open redirect was possible when the user clicked "Back to Mattermost" after providing a invalid custom url scheme in /oauth/{service}/mobile_login?redirect_to=

Patch / fix

  • go github.com/mattermost/mattermost/server/v8 8.1.4, 9.0.2, 9.1.1
  • go github.com/mattermost/mattermost-server/v6 7.8.13
  • Mattermost Mattermost 7.8.13, 8.1.4, 9.0.2, 9.1.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 mo ago

Exploit prediction

0.40% chance of exploitation in the next 30 days, higher than 34% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost/server/v8
>=9.1.0, <9.1.1
>=9.0.0, <9.0.2
<8.1.4
9.1.1
9.0.2
8.1.4
go github.com/mattermost/mattermost-server/v6
<7.8.13
7.8.13

Affected products

  • Mattermost Mattermost

Classification

Weakness
  • CWE-601 URL Redirection to Untrusted Site

References

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.