Possible Server-Side Request Forgery (SSRF) in webhooks

published 2022-11-02 4 y ago modified 2026-09-10 59 d ago also BIT-discourse-2022-39241 , EUVD-2022-41763 , GHSA-rcc5-28r3-23rr

cvss: 7.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

bitnami discourse 2.8.10
discourse discourse 2.8.10

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-23)

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.6	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
NVD	3.1	4.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
OSV	3.1	7.6	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
bitnami	discourse	<2.8.10	2.8.10

Affected products

discourse discourse

Classification

Weakness

CWE-918 Server-Side Request Forgery

References

github.com /discourse/discourse/security/advisories/GHSA-rcc5-28r3-23rr
third-party-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2022-39241
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary