Security readout for executives and security teams
Plain-English summary
Dolibarr had an access-control flaw in the Reception area. A user who should have had restricted permissions could view specific reception details by going directly to a URL. The source bundle rates this medium severity, with limited documented impact and no KEV-listed active exploitation.
Executive priority
Treat as a normal-priority remediation for Dolibarr environments, especially where restricted internal users access Reception workflows. It is not supported as emergency patching from the provided evidence, but access-control bypasses should not remain open.
Technical view
CVE-2021-3991 is a CWE-285 improper authorization issue in dolibarr/dolibarr. The provided description says restricted Reception users could bypass intended permission checks through direct URL access. Affected versions are not precisely enumerated beyond versions before the referenced develop-branch fix, and no CPEs are supplied.
Likely exposure
Exposure is limited to Dolibarr deployments using the Reception functionality with restricted-permission users. The source bundle does not provide exact affected release numbers, so teams must map their installed version or commit against Dolibarr’s upstream fix.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation evidence. The issue is publicly documented through Huntr and a Dolibarr GitHub commit, which may increase awareness, but the provided sources do not prove weaponized exploitation.
Researcher notes
The source data has gaps: affected versions are unspecified, CPEs are absent, and the CVSS vector lists PR:N/UI:R while the description centers on restricted authenticated users. Validate against upstream code and vendor release history before broad exposure claims.
Mitigation direction
- Review Dolibarr guidance and the referenced upstream commit.
- Upgrade to a Dolibarr release that includes the authorization fix.
- Limit Reception access to users with a clear business need.
- Review roles for overbroad or stale Reception permissions.
- Monitor Dolibarr advisories for exact fixed-version guidance.
Validation and detection
- Inventory all Dolibarr instances and deployed versions.
- Map each instance to the referenced upstream fix status.
- Review Reception users with restricted permissions.
- Verify restricted test users cannot access reception detail records.
- Check access logs for unusual reception detail requests.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-285: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-3991 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.