Vulnerability · Published Oct 16, 2023 · Assigned by GitHub_M

CVE-2023-45660Require strict cookies for image proxy requests in Nextcloud Mail

Medium 4.3

In plain English

A medium-severity server-side 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 0.8% (higher than 55% of all known vulnerabilities).

Severity (CVSS 3.1)4.3Medium

Exploit odds (30 days)0.8%top 44.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Nextcloud mail is an email app for the Nextcloud home server platform. In affected versions a missing check of origin, target and cookies allows for an attacker to abuse the proxy endpoint to denial of service a third server. It is recommended that the Nextcloud Mail is upgraded to 2.2.8 or 3.3.0. There are no known workarounds for this vulnerability.

Affected products (as reported)

Vendor	Product	Versions
nextcloud	security-advisories	>= 2.0.0, < 2.2.8>= 3.0.0, < 3.3.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

https://github.com/nextcloud/security-advisories/security/advisories/GHSA-8j9x-fmww-qr37 x_refsource_CONFIRM
https://github.com/nextcloud/mail/pull/8459 x_refsource_MISC
https://hackerone.com/reports/1895874 x_refsource_MISC