Vulnerability · Published Apr 4, 2023 · Assigned by GitHub_M

CVE-2023-28848CSRF protection on user_oidc login returned the expected token in case of an error

Medium 4.8

In plain English

A medium-severity cross-site request forgery in security-advisories from nextcloud. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)4.8Medium

Exploit odds (30 days)0.3%top 73.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

user_oidc is the OIDC connect user backend for Nextcloud, an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	>= 1.0.0, < 1.3.0

Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-52hv-xw32-wf7f x_refsource_CONFIRM
https://github.com/nextcloud/user_oidc/pull/580 x_refsource_MISC
https://hackerone.com/reports/1878381 x_refsource_MISC