CVE-2022-23549: Discourse vulnerable to bypass of post max_length using HTML comments
First published: Thu Jan 05 2023(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Discourse Discourse | <2.8.14 | |
| Discourse Discourse | =2.9.0-beta1 | |
| Discourse Discourse | =2.9.0-beta10 | |
| Discourse Discourse | =2.9.0-beta11 | |
| Discourse Discourse | =2.9.0-beta12 | |
| Discourse Discourse | =2.9.0-beta13 | |
| Discourse Discourse | =2.9.0-beta14 | |
| Discourse Discourse | =2.9.0-beta2 | |
| Discourse Discourse | =2.9.0-beta3 | |
| Discourse Discourse | =2.9.0-beta4 | |
| Discourse Discourse | =2.9.0-beta5 | |
| Discourse Discourse | =2.9.0-beta6 | |
| Discourse Discourse | =2.9.0-beta7 | |
| Discourse Discourse | =2.9.0-beta8 | |
| Discourse Discourse | =3.0.0-beta15 |
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Reference Links
Frequently Asked Questions
What is CVE-2022-23549?
CVE-2022-23549 is a vulnerability in Discourse that allows users to create posts with a raw body longer than the max_length site setting.
How severe is CVE-2022-23549?
CVE-2022-23549 has a severity score of 6.5, which is considered medium.
How can I fix CVE-2022-23549 in Discourse?
To fix CVE-2022-23549 in Discourse, you need to update to version 2.8.14 on the stable branch or version 2.9.0.beta16 on the beta and tests-passed branches.
Where can I find more information about CVE-2022-23549?
You can find more information about CVE-2022-23549 on the GitHub commit and security advisory links provided: [GitHub Commit](https://github.com/discourse/discourse/commit/bf6b08670a927cc80bb090b7a2e710b4b554e6a8), [Security Advisory](https://github.com/discourse/discourse/security/advisories/GHSA-p47g-v5wr-p4xp).
What is the CWE classification of CVE-2022-23549?
CVE-2022-23549 is classified as CWE-20, which is Improper Input Validation.
- collector/nvd-index
- agent/type
- agent/references
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/title
- agent/severity
- agent/remedy
- agent/author
- agent/last-modified-date
- agent/event
- agent/first-publish-date
- agent/tags
- agent/description
- vendor/discourse
- canonical/discourse discourse
- version/discourse discourse/2.9.0-beta1
- version/discourse discourse/2.9.0-beta10
- version/discourse discourse/2.9.0-beta11
- version/discourse discourse/2.9.0-beta12
- version/discourse discourse/2.9.0-beta13
- version/discourse discourse/2.9.0-beta14
- version/discourse discourse/2.9.0-beta2
- version/discourse discourse/2.9.0-beta3
- version/discourse discourse/2.9.0-beta4
- version/discourse discourse/2.9.0-beta5
- version/discourse discourse/2.9.0-beta6
- version/discourse discourse/2.9.0-beta7
- version/discourse discourse/2.9.0-beta8
- version/discourse discourse/3.0.0-beta15