Vulnerability · Published Nov 2, 2022 · Assigned by GitHub_M

CVE-2022-39241Possible Server-Side Request Forgery (SSRF) in webhooks

High 7.6

In plain English

A high-severity server-side request forgery in discourse from discourse. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)0.6%top 48.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Discourse is a platform for community discussion. A malicious admin could use this vulnerability to perform port enumeration on the local host or other hosts on the internal network, as well as against hosts on the Internet. Latest `stable`, `beta`, and `test-passed` versions are now patched. As a workaround, self-hosters can use `DISCOURSE_BLOCKED_IP_BLOCKS` env var (which overrides `blocked_ip_blocks` setting) to stop webhooks from accessing private IPs.

Affected products (as reported)

Vendor	Product	Versions
discourse	discourse	<= 2.8.9<= 2.9.0.beta10

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

References

https://github.com/discourse/discourse/security/advisories/GHSA-rcc5-28r3-23rr