CVE-2024-23834: discourse XSS — Fix

Description

Discourse is an open-source discussion platform. Improperly sanitized user input could lead to an XSS vulnerability in some situations. This vulnerability only affects Discourse instances which have disabled the default Content Security Policy. The vulnerability is patched in 3.1.5 and 3.2.0.beta5. As a workaround, ensure Content Security Policy is enabled and does not include `unsafe-inline`.

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CVSS v3.1 Score

6.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
discourse	discourse	< 3.1.5
discourse	discourse	< 3.2.0
discourse	discourse	All
discourse	discourse	All
discourse	discourse	All
discourse	discourse	All

References

Advisories & Patches

https://github.com/discourse/discourse/commit/568d704a94c528b7c2cb0f3512a7b7b606bc3000 https://github.com/discourse/discourse/security/advisories/GHSA-rj3g-8q6p-63pc https://meta.discourse.org/t/3-1-5-security-and-bug-fix-release/293094 https://meta.discourse.org/t/3-2-0-beta5-add-groups-to-dms-mobile-chat-footer-redesign-passkeys-enabled-by-default-and-more/293093 https://github.com/discourse/discourse/commit/568d704a94c528b7c2cb0f3512a7b7b606bc3000 https://github.com/discourse/discourse/security/advisories/GHSA-rj3g-8q6p-63pc https://meta.discourse.org/t/3-1-5-security-and-bug-fix-release/293094 https://meta.discourse.org/t/3-2-0-beta5-add-groups-to-dms-mobile-chat-footer-redesign-passkeys-enabled-by-default-and-more/293093

Frequently Asked Questions

What is CVE-2024-23834? +

Discourse is an open-source discussion platform. Improperly sanitized user input could lead to an XSS vulnerability in some situations. This vulnerability only affects Discourse instances which have disabled the default Content Security Policy. The vulnerability is patched in 3.1.5 and 3.2.0.beta5. As a workaround, ensure Content Security Policy is enabled and does not include `unsafe-inline`. It has a CVSS v3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2024-23834? +

CVE-2024-23834 has a CVSS v3.1 score of 6.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-23834? +

CVE-2024-23834 affects products from discourse, specifically: discourse. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-23834? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-23834