CVE-2024-43408

Discourse Placeholder Forms has a XSS stopped by CSP

6.3 Medium

Discourse Placeholder Forms will let you build dynamic documentation. Unsanitized and stored user input was injected in the html of the post. The vulnerability is fixed in commit a62f711d5600e4e5d86f342d52932cb6221672e7.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: Low

Exploit likelihood

0.26%Up 0.2 points since Aug 21, 2024

What each source reports

CVE List Score used 6.3

Discourse Placeholder Forms has a XSS stopped by CSP

Record: CVE-2024-43408
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2024-40270 6.3

Record: EUVD-2024-40270
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Updated: 2026-11-03

NVD 6.3

Record: CVE-2024-43408
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

OSV 6.3

Discourse Placeholder Forms has a XSS stopped by CSP

Record: CVE-2024-43408
CVSS 3.1: 6.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
Weakness: CWE-79
Updated: 2026-11-02

Affected products

discourse discourse-placeholder-theme-component

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-43408 is a medium vulnerability (CVSS 6.3) in Discourse Discourse-placeholder-theme-component, published August 20, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 17th percentile. No source names a fixed version.