CVE-2023-45806

MEDIUM

Discourse <3.1.3, <3.2.0.beta3 - Info Disclosure

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2023-45806. PoCs published by yksivaihde.

AI-analyzed exploit summary This repository contains a functional Ruby script to fix quote attributions in Discourse posts affected by CVE-2023-45806. The script identifies and corrects mismatched usernames in quote blocks by querying the database and updating posts.

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.

Exploits (1)

nomisec WORKING POC
by yksivaihde · poc
https://github.com/yksivaihde/discourse-CVE-2023-45806

This repository contains a functional Ruby script to fix quote attributions in Discourse posts affected by CVE-2023-45806. The script identifies and corrects mismatched usernames in quote blocks by querying the database and updating posts.

Classification
Working Poc 90%
Attack Type
Other
Complexity
Moderate
Reliability
Reliable
Target: Discourse (version not specified)
Auth required
Prerequisites: Access to Discourse database · Administrative privileges to modify posts
devstral-2 · analyzed Feb 18, 2026 Full analysis →

Scores

CVSS v3 4.3
EPSS 0.0100
EPSS Percentile 58.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-1333
Status published
Products (3)
discourse/discourse 3.2.0 beta1 (2 CPE variants)
discourse/discourse < 3.1.3
discourse/discourse < 3.2.0
Published Nov 10, 2023
Tracked Since Feb 18, 2026