CVE-2025-47790: Nextcloud Server doesn't request second factor after session timeout

Medium severity · published May 16, 2025

CVE-2025-47790

Nextcloud Server doesn't request second factor after session timeout

6.4

CVSS

0.4%

EPSS

On KEV

Description

Nextcloud Server is a self hosted personal cloud system. Nextcloud Server prior to 29.0.15, 30.0.9, and 31.0.3 and Nextcloud Enterprise Server prior to 26.0.13.15, 27.1.11.15, 28.0.14.6, 29.0.15, 30.0.9, and 31.0.3 have a bug with session handling. The bug caused skipping the second factor confirmation after a successful login with the username and password when the server was configured with `remember_login_cookie_lifetime` set to `0`, once the session expired on the page to select the second factor and the page is reloaded. Nextcloud Server 29.0.15, 30.0.9, and 31.0.3 and Nextcloud Enterprise Server is upgraded to 26.0.13.15, 27.1.11.15, 28.0.14.6, 29.0.15, 30.0.9 and 31.0.3 contain a patch. As a workaround, set the `remember_login_cookie_lifetime` in config.php to a value other than `0`, e.g. `900`. Beware that this is only a workaround for new sessions created after the configuration change. System administration can delete affected sessions.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N

Attack vector

Network

Complexity

High

Privileges

Low

User interaction

Required

Confidentiality

High

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.4% · higher than 33% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

security-advisories · nextcloud

>= 26.0.0, < 26.0.13.15; >= 27.0.0, < 27.1.11.15; >= 28.0.0, < 28.0.14.6; >= 29.0.0, < 29.0.15; >= 30.0.0, < 30.0.9; >= 31.0.0, < 31.0.3 · source: vendor

Nextcloud Server · Nextcloud

26.0.0 before 26.0.13.15; 27.0.0 before 27.1.11.15; 28.0.0 before 28.0.14.6; 29.0.0 before 29.0.15; 29.0.0 before 29.0.15; 30.0.0 before 30.0.9; +3 more · source: NVD

Affected product

security-advisories

nextcloud

All security-advisories CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2025-47790

CVE.org

https://www.cve.org/CVERecord?id=CVE-2025-47790

Vendor Advisory

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-9h3w-f3h4-qqrh

Issue Tracking

https://github.com/nextcloud/server/pull/51905

Permissions Required

https://hackerone.com/reports/2729367