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MEDIUM severity

CVE-2021-3991 — dolibarr

MEDIUMFix: dolibarr/dolibarr@63cd063

CVE-2021-3991 is a medium-severity (CVSS 4.3) CWE-285 vulnerability in dolibarr/dolibarr. A fix is available for dolibarr/dolibarr — see the affected versions and patch details below.

Improper Authorization in dolibarr/dolibarr

Also known asBIT-dolibarr-2021-3991GHSA-wppr-j57c-8jpm
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2021-3991.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs26th percentile — riskier than 26% of all scored CVEsHighest risk
0.00%0.28%0.55%0.83%0.1%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐘dolibarr/dolibarr

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

An Improper Authorization vulnerability exists in Dolibarr versions prior to the 'develop' branch. A user with restricted permissions in the 'Reception' section is able to access specific reception details via direct URL access, bypassing the intended permission restrictions.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistdolibarr/dolibarrall versions15.0.0composer require dolibarr/dolibarr:^15.0.0

Affected Products

1 product · 1 configurations
Application
dolibarr erp\/crmdolibarr
< 20.0.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for dolibarr/dolibarr, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update dolibarr/dolibarr to 15.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-3991 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

An Improper Authorization vulnerability exists in Dolibarr versions prior to the 'develop' branch. A user with restricted permissions in the 'Reception' section is able to access specific reception details via direct URL access, bypassing the intended permission restrictions.
O3 Security · Impact-Aware SCA

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CVE-2021-3991: dolibarr — Fixed in 15.0.0