CVE-2023-23621

Discourse vulnerable to ReDoS in user agent parsing

Discourse is an open-source discussion platform. Prior to version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches, a malicious user can cause a regular expression denial of service using a carefully crafted user agent. This issue is patched in version 3.0.1 on the `stable` branch and version 3.1.0.beta2 on the `beta` and `tests-passed` branches. There are no known workarounds.

We have discovered 1,166 live websites that are affected by CVE-2023-23621.

Contact us to get more info



Affected Software

Product  Discourse
Category Message Boards
Vulnerable Domains1,166 live websites (22.32% of Discourse install base)
Vulnerable Versions
  • from 0 before 3.0.1
Vulnerable Versions Count72 versions ( 75.79% of all versions)


Common Weakness Enumeration

CWE-1333 Inefficient Regular Expression Complexity



Details

  • Published - Jan 27, 2023
  • Updated - Aug 2, 2024

CVE-2023-23621 usage by Country

United States799 websites


Germany94 websites
France52 websites
Singapore35 websites
China26 websites
GB18 websites
Brazil11 websites
Netherlands11 websites
Switzerland10 websites

CVE-2023-23621 usage by TLD

.com490 websites
.org187 websites
.io59 websites
.net50 websites
.de25 websites
.fr15 websites
.co14 websites
.ru12 websites
.eu11 websites
.com.br10 websites

Vulnerable Versions

Vulnerable versions are highlighted in red

Websites affected by CVE-2023-23621

Top websites that are affected by CVE-2023-23621. Please click on the "Contact us" link to get more information.
DomainCountryRankContacts
*********.***.com France*,***
*********.*******.org United States**,***
******.********.com United States**,***
*********.***************.com United States**,***
*********.**********.de Germany***,***
*********.*********.com ***,***
*********.**********.io United States***,***
***.***********.org Germany***,***
*****.******.com United States***,***
***********.net United States***,***
See full domain list

FAQ

CVE-2023-23621 is Inefficient Regular Expression Complexity in Discourse
A total of 1,166 websites have been identified as vulnerable to CVE-2023-23621, discovered through global website indexing conducted by WebTechSurvey.
Discourse is susceptible to CVE-2023-23621 vulnerability.
Discourse versions before 3.0.1 are vulnerable to CVE-2023-23621.
Version 3.0.1 of Discourse addresses the CVE-2023-23621 security vulnerability.