CVE-2024-35227: discourse Input Validation Flaw — Fix

Description

Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability.

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-20 Improper Input Validation

Affected Products

Vendor	Product	Versions
discourse	discourse	< 3.2.2

References

Advisories & Patches

https://github.com/discourse/discourse/commit/10afe5fcf1ebf2e49cb80716d5e62e184c53519b https://github.com/discourse/discourse/commit/6ce5673d2c1a511b602e1b2ade6cdc898d14ab36 https://github.com/discourse/discourse/commit/10afe5fcf1ebf2e49cb80716d5e62e184c53519b https://github.com/discourse/discourse/commit/6ce5673d2c1a511b602e1b2ade6cdc898d14ab36

Other References

https://github.com/discourse/discourse/security/advisories/GHSA-664f-xwjw-752c https://github.com/discourse/discourse/security/advisories/GHSA-664f-xwjw-752c

Frequently Asked Questions

What is CVE-2024-35227? +

Discourse is an open-source discussion platform. Prior to version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch, Oneboxing against a carefully crafted malicious URL can reduce the availability of a Discourse instance. The problem has been patched in version 3.2.3 on the `stable` branch and version 3.3.0.beta3 on the `tests-passed` branch. There are no known workarounds available for this vulnerability. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2024-35227? +

CVE-2024-35227 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2024-35227? +

CVE-2024-35227 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-2024-35227? +

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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