CVE-2023-40599

Name: CVE-2023-40599
Creator: NVD / NIST
Published: 2023-08-25T03:15:08.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.67%

Last modified Jun 17, 2026

CVE-2023-40599 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Regular expression Denial-of-Service (ReDoS) exists in multiple add-ons for Mailform Pro CGI 4.3.1.3 and earlier, which allows a remote unauthenticated attacker to cause a denial-of-service condition. Affected add-ons are as follows: call/call.js, prefcodeadv/search.cgi, estimate/estimate.js, search/search.js, suggest/suggest.js, and coupon/coupon.js.. EPSS estimates a 0.67% chance of exploitation in the next 30 days.

Description

Regular expression Denial-of-Service (ReDoS) exists in multiple add-ons for Mailform Pro CGI 4.3.1.3 and earlier, which allows a remote unauthenticated attacker to cause a denial-of-service condition. Affected add-ons are as follows: call/call.js, prefcodeadv/search.cgi, estimate/estimate.js, search/search.js, suggest/suggest.js, and coupon/coupon.js.

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

0.67%

47.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Synck Graphica	Mailform Pro Cgi	<= 4.3.1.3

References

https://jvn.jp/en/jp/JVN86484824/Third Party Advisory
https://www.synck.com/blogs/news/newsroom/detail_1691668841.htmlVendor Advisory
https://jvn.jp/en/jp/JVN86484824/Third Party Advisory
https://www.synck.com/blogs/news/newsroom/detail_1691668841.htmlVendor Advisory

Timeline

Published: Aug 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-40599?

How severe is CVE-2023-40599?

CVE-2023-40599 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.67% probability of exploitation in the next 30 days.

How do I fix CVE-2023-40599?

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-2023-40599?

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

Scan your code now

Source: NVD / NIST