CVE-2023-45806— Discourse vulnerable to DoS via Regexp Injection in Full Name
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I. Basic Information for CVE-2023-45806
Vulnerability Information
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Vulnerability Title
Discourse vulnerable to DoS via Regexp Injection in Full Name
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
CWE-1333
Source: NVD (National Vulnerability Database)
Vulnerability Title
Discourse 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是一套开源的社区讨论平台。该平台包括社区、电子邮件和聊天室等功能。 Discourse 3.1.3 版本之前存在安全漏洞，该漏洞源于如果用户的全名中使用了“|”，同时该用户被引用，在该用户更新其全名时会在他们被引用的帖子中生成大量内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-45806
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | None | https://github.com/pikariop/yksivaihde-CVE-2023-45806 | POC Details |
| 2 | None | https://github.com/yksivaihde/discourse-CVE-2023-45806 | POC Details |
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Same Patch Batch · discourse · 2023-11-10 · 6 CVEs total
| CVE-2023-47120 | 7.5 HIGH | Discourse DoS through Onebox favicon URL |
| CVE-2023-47119 | 5.3 MEDIUM | HTML injection in oneboxed links |
| CVE-2023-46130 | 4.3 MEDIUM | Bypassing height value allowed in some theme components |
| CVE-2023-47121 | 3.4 LOW | Discourse SSRF vulnerability in Embedding |
| CVE-2023-45816 | 3.3 LOW | Unread bookmark reminder notifications that the user cannot access can be seen |
IV. Related Vulnerabilities
Same product: discourse
- CVE-2026-34947
Discourse: Staged user custom fields are exposed on public i - CVE-2026-27481
Discourse: Hidden tag visibility bypass on tag routes - CVE-2026-33415
Discourse: Improper Access Control in discourse-ai Allows Un - CVE-2026-33300
Discourse: Hidden group names and access metadata are expose - CVE-2026-33185
Discourse: Group SMTP test endpoint susceptible to SSRF
Same vendor: discourse
- CVE-2026-34947
Discourse: Staged user custom fields are exposed on public i - CVE-2026-27481
Discourse: Hidden tag visibility bypass on tag routes - CVE-2026-33415
Discourse: Improper Access Control in discourse-ai Allows Un - CVE-2026-33300
Discourse: Hidden group names and access metadata are expose - CVE-2026-33185
Discourse: Group SMTP test endpoint susceptible to SSRF
Same weakness: CWE-1333
- CVE-2026-33079
Mistune ReDoS in LINK_TITLE_RE allows denial of service with - CVE-2026-41040
GROWI 安全漏洞 - CVE-2026-40319
Giskard has a Regular Expression Denial of Service (ReDoS) i - CVE-2026-5986
Zod jsVideoUrlParser util.js getTime redos - CVE-2026-35041
ReDoS in fast-jwt when using RegExp in allowed* leading to C
V. Comments for CVE-2023-45806
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