CVE-2023-45806 json
Discourse vulnerable to DoS via Regexp Injection in Full Name
published 2023-11-10 2 y ago modified 2026-09-08 2 mo ago also BIT-discourse-2023-45806 , EUVD-2023-50093 , GHSA-hcgf-hg2g-mw78
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 63%
- public exploits
- 0
- none known
Summary
Discourse is an open source platform for community discussion. Prior to version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches, if a user has been quoted and uses a `|` in their full name, they might be able to trigger a bug that generates a lot of duplicate content in all the posts they've been quoted by updating their full name again. Version 3.1.3 of the `stable` branch and version 3.2.0.beta3 of the `beta` and `tests-passed` branches contain a patch for this issue. No known workaround exists, although one can stop the "bleeding" by ensuring users only use alphanumeric characters in their full name field.
Patch / fix
- bitnami discourse 3.2.0
- discourse discourse 3.1.3, 3.2.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
1.00% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <3.2.0 |
3.2.0 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-1333 Inefficient Regular Expression Complexity
References
-
github.com
/discourse/discourse/commit/2ec25105179199cf80912bf011c18b8b870e1863
patch
-
github.com
/discourse/discourse/commit/7d484864fe91ff79c478f57e7ddb1235d701921e
patch
-
github.com
/discourse/discourse/security/advisories/GHSA-hcgf-hg2g-mw78
patch, vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-45806
web
Sources
- CVE List CVE-2023-45806
- NVD CVE-2023-45806
- OSV BIT-discourse-2023-45806
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