CVE-2022-23549

Discourse vulnerable to bypass of post max_length using HTML comments

State: Published
Severity: 5.7 Medium
Published: Jan 5, 2023
Updated: Mar 10, 2025
Reserved: Jan 19, 2022

Description

Discourse is an option source discussion platform. Prior to version 2.8.14 on the `stable` branch and version 2.9.0.beta16 on the `beta` and `tests-passed` branches, users can create posts with raw body longer than the `max_length` site setting by including html comments that are not counted toward the character limit. This issue is patched in versions 2.8.14 and 2.9.0.beta16. There are no known workarounds.

Scores

CVSS	Score	Vector	Source
3.1	5.7 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation

Affected Products

Product	Versions
discoursediscourse	2.8.14 to before 2.8.14Affected 2.9.0.beta0 through 2.9.0.beta0Affected 2.9.0.beta16 to before 2.9.0.beta16Affected

References

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