CVE-2021-33816

Dolibarr remote PHP code execution

9.8 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

3.94%Up 2.8 points since Nov 11, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2021-33816
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-94
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-33816
Updated: 2026-11-02

EUVDEUVD-2022-5459 No score

Record: EUVD-2022-5459
Updated: 2026-11-03

GitHub AdvisoriesGHSA-vxr9-p2xw-m8cf 9.8

Dolibarr remote PHP code execution

Record: GHSA-vxr9-p2xw-m8cf
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

OSV 9.8

Record: CVE-2021-33816
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-vxr9-p2xw-m8cf 9.8

Dolibarr remote PHP code execution

Record: GHSA-vxr9-p2xw-m8cf
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-94
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-33816 9.8

Record: UBUNTU-CVE-2021-33816
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVBIT-dolibarr-2021-33816 No score

Record: BIT-dolibarr-2021-33816
Updated: 2026-11-02

Affected products

dolibarr erp\/crm

Affected packages

Affected packages
Package	Affected	Fixed
`dolibarr/dolibarr` Packagist	13.0.2 to 13.0.2	14.0.0
`dolibarr` Bitnami	13.0.2 to 13.0.2	None known
`dolibarr/dolibarr` Packagist	13.0.2 up to 14.0.0, plus listed versions 13.0.313.0.413.0.5	14.0.0
`dolibarr` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.5.5+dfsg1-23.5.7+dfsg1-13.5.8+dfsg1-13.5.8+dfsg1-1ubuntu13.5.8+dfsg1-1ubuntu1+esm1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-33816 is a critical vulnerability (CVSS 9.8) in Dolibarr Erp\/crm, published November 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.94%, the 90th percentile. Fixed in dolibarr/dolibarr 14.0.0.