Vulnerability · Published Jan 18, 2024 · Assigned by GitHub_M

CVE-2024-22402Improper handling of request URLs in Nextcloud Guests app allows guest users to bypass app allowlist

Medium 5.4

In plain English

A medium-severity security flaw 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 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.5%top 56.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Nextcloud guests app is a utility to create guest users which can only see files shared with them. In affected versions users were able to load the first page of apps they were actually not allowed to access. Depending on the selection of apps installed this may present a permissions bypass. It is recommended that the Guests app is upgraded to 2.4.1, 2.5.1 or 3.0.1. There are no known workarounds for this vulnerability.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	>= 2.4.0, < 2.4.1>= 2.5.0, < 2.5.1>= 3.0.0, < 3.0.1

Weakness: CWE-281 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-v3qw-7vgv-2fxj x_refsource_CONFIRM
https://github.com/nextcloud/guests/pull/1082 x_refsource_MISC
https://hackerone.com/reports/2251074 x_refsource_MISC