CVE-2023-45131

Name: CVE-2023-45131
Creator: NVD / NIST
Published: 2023-10-16T22:15:12.65+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.81%

Last modified Jun 17, 2026

CVE-2023-45131 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Discourse is an open source platform for community discussion. New chat messages can be read by making an unauthenticated POST request to MessageBus. EPSS estimates a 1.81% chance of exploitation in the next 30 days.

Description

Discourse is an open source platform for community discussion. New chat messages can be read by making an unauthenticated POST request to MessageBus. This issue is patched in the 3.1.1 stable and 3.2.0.beta2 versions of Discourse. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.81%

75.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions	Update
Discourse	Discourse	<= 3.1.1	—
Discourse	Discourse	3.2.0	Beta1

References

https://github.com/discourse/discourse/security/advisories/GHSA-84gf-hhrc-9pw6Vendor Advisory
https://github.com/discourse/discourse/security/advisories/GHSA-84gf-hhrc-9pw6Vendor Advisory

Timeline

Published: Oct 16, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45131?

How severe is CVE-2023-45131?

CVE-2023-45131 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45131?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45131?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST