Discourse up to 3.0.0/3.1.0.beta1 URL full name cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as problematic was found in Discourse up to 3.0.0/3.1.0.beta1. This vulnerability affects an unknown code block of the component URL Handler. The manipulation of the argument full name with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Discourse is an open-source discussion platform. Prior to version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches, a maliciously crafted URL can be included in a user's full name field to to carry out cross-site scripting attacks on sites with a disabled or overly permissive CSP (Content Security Policy). Discourse's default CSP prevents this vulnerability. The vulnerability is patched in version 3.0.1 of the `stable` branch and version 3.1.0.beta2 of the `beta` and `tests-passed` branches. As a workaround, enable and/or restore your site's CSP to the default one provided with Discourse.

The weakness was shared 03/18/2023 as GHSA-7pm2-prxw-wrvp. The advisory is available at github.com. This vulnerability was named CVE-2023-25172 since 02/03/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 3.0.1 or 3.1.0.beta2 eliminates this vulnerability. Applying the patch 1a5a6f66cb821ed29a737311d6fdc2eba5adc915 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.




  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.4
CNA Vector (GitHub, Inc.): 🔒



VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Discourse 3.0.1/3.1.0.beta2
Patch: 1a5a6f66cb821ed29a737311d6fdc2eba5adc915


02/03/2023 CVE reserved
03/18/2023 +43 days Advisory disclosed
03/18/2023 +0 days VulDB entry created
03/18/2023 +0 days VulDB last update


Advisory: GHSA-7pm2-prxw-wrvp
Status: Confirmed

CVE: CVE-2023-25172 (🔒)


Created: 03/18/2023 08:38 AM
Changes: 03/18/2023 08:38 AM (53)
Complete: 🔍


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