CVE-2023-31606

Name: CVE-2023-31606
Creator: NVD / NIST
Published: 2023-06-06T17:15:14.843+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2023-31606 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

A Regular Expression Denial of Service (ReDoS) issue was discovered in the sanitize_html function of redcloth gem v4.0.0. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted payload.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.51%

71.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Promptworks	Redcloth	>= 4.0.0, <= 4.3.2

References

https://github.com/e23e/CVE-2023-31606#readmeExploit, Third Party Advisory
https://github.com/jgarber/redclothProduct
https://github.com/jgarber/redcloth/issues/73Exploit, Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00002.html
https://security.gentoo.org/glsa/202401-14
https://github.com/e23e/CVE-2023-31606#readmeExploit, Third Party Advisory
https://github.com/jgarber/redclothProduct
https://github.com/jgarber/redcloth/issues/73Exploit, Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/07/msg00002.html
https://security.gentoo.org/glsa/202401-14

Timeline

Published: Jun 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31606?

How severe is CVE-2023-31606?

CVE-2023-31606 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31606?

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-2023-31606?

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

Scan your code now

Source: NVD / NIST