#VU94855 Improper Neutralization of Special Elements in Output Used by a Downstream Component in Discourse - CVE-2024-39320

Vulnerability identifier: #VU94855

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-39320

CWE-ID: CWE-74

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Discourse
Web applications / Forum & blogging software

Vendor: Civilized Discourse Construction Kit, Inc.

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to iframe injection though default site setting. A remote attacker can inject iframes from any domain.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Discourse: before 3.2.2

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External links
https://github.com/discourse/discourse/security/advisories/GHSA-4p82-xh38-gq4p

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.