CVE-2021-31646

Name: CVE-2021-31646
Creator: NVD / NIST
Published: 2021-04-26T19:15:08.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.34%

Last modified Jun 17, 2026

CVE-2021-31646 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Gestsup before 3.2.10 allows account takeover through the password recovery functionality (remote). The affected component is the file forgot_pwd.php - it uses a weak algorithm for the generation of password recovery tokens (the PHP uniqueid function), allowing a brute force attack.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

Gestsup before 3.2.10 allows account takeover through the password recovery functionality (remote). The affected component is the file forgot_pwd.php - it uses a weak algorithm for the generation of password recovery tokens (the PHP uniqueid function), allowing a brute force attack.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

1.34%

67.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-307

Affected Software

Vendor	Product	Versions
Gestsup	Gestsup	< 3.2.10

References

https://dojo.maltem.ca/public/advisories/CVE-2021-31646.htmlBroken Link, Third Party Advisory
https://gestsup.fr/index.php?page=downloadPatch, Vendor Advisory
https://gestsup.fr/index.php?page=download&channel=beta&version=3.2.10&type=patchPatch, Vendor Advisory
https://dojo.maltem.ca/public/advisories/CVE-2021-31646.htmlBroken Link, Third Party Advisory
https://gestsup.fr/index.php?page=downloadPatch, Vendor Advisory
https://gestsup.fr/index.php?page=download&channel=beta&version=3.2.10&type=patchPatch, Vendor Advisory

Timeline

Published: Apr 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31646?

How severe is CVE-2021-31646?

CVE-2021-31646 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31646?

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-2021-31646?

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

Scan your code now

Source: NVD / NIST