Medium severity · published Jan 18, 2024
CVE-2024-22400
Open redirect in user_saml via RelayState parameter in Nextcloud User Saml
6.1
CVSS
0.5%
EPSS
No
On KEV
Description
Nextcloud User Saml is an app for authenticating Nextcloud users using SAML. In affected versions users can be given a link to the Nextcloud server and end up on a uncontrolled thirdparty server. It is recommended that the User Saml app is upgraded to version 5.1.5, 5.2.5, or 6.0.1. There are no known workarounds for this issue.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · nextcloud
>= 5.0.0, < 5.1.5; >= 5.2.0, < 5.2.5; >= 6.0.0, < 6.0.1 · source: vendor
SS
Sso & Saml Authentication · Nextcloud
5.0.0 before 5.1.5; 5.2.0 before 5.2.5; 6.0.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-22400
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-22400
Vendor Advisory
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-622q-xhfr-xmv7
Patch
https://github.com/nextcloud/user_saml/commit/b184304a476deeba36e92b70562d5de7c2f85f8a
Patch
https://github.com/nextcloud/user_saml/pull/788
Permissions Required
https://hackerone.com/reports/2263044
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