CVE-2021-33816

Name: CVE-2021-33816
Creator: NVD / NIST
Published: 2021-11-10T23:15:08.163+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.82%

Last modified Jun 17, 2026

CVE-2021-33816 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The website builder module in Dolibarr 13.0.2 allows remote PHP code execution because of an incomplete protection mechanism in which system, exec, and shell_exec are blocked but backticks are not blocked.. EPSS estimates a 3.82% chance of exploitation in the next 30 days.

Description

The website builder module in Dolibarr 13.0.2 allows remote PHP code execution because of an incomplete protection mechanism in which system, exec, and shell_exec are blocked but backticks are not blocked.

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

3.82%

88.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions
Dolibarr	Dolibarr Erp\/Crm	13.0.2

References

http://seclists.org/fulldisclosure/2021/Nov/39Exploit, Mailing List, Third Party Advisory
https://trovent.github.io/security-advisories/TRSA-2106-01/TRSA-2106-01.txtExploit, Third Party Advisory
https://trovent.io/security-advisory-2106-01Exploit, Third Party Advisory
http://seclists.org/fulldisclosure/2021/Nov/39Exploit, Mailing List, Third Party Advisory
https://trovent.github.io/security-advisories/TRSA-2106-01/TRSA-2106-01.txtExploit, Third Party Advisory
https://trovent.io/security-advisory-2106-01Exploit, Third Party Advisory

Timeline

Published: Nov 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33816?

How severe is CVE-2021-33816?

CVE-2021-33816 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33816?

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-2021-33816?

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

Scan your code now

Source: NVD / NIST