Security readout for executives and security teams
Plain-English summary
CVE-2021-25956 is a Dolibarr access-control flaw where an authenticated administrator can accidentally or deliberately overwrite another user’s credentials by renaming a login without proper duplicate-name validation. Business impact is account takeover inside the application, but exploitation requires high privileges.
Executive priority
Treat this as a moderate-priority administrative control risk. It is not documented as actively exploited, but affected Dolibarr systems should be upgraded or otherwise controlled because a compromised administrator could take over other accounts.
Technical view
Dolibarr versions v3.3.beta1_20121221 through v13.0.2 fail to validate an existing login name during user-login modification. With admin-level modify access, changing a user login can overwrite the password for another user with a similar or colliding login, enabling takeover. CVSS 3.1 is 4.7, PR:H, AV:N.
Likely exposure
Exposure is limited to Dolibarr deployments in the stated affected range, especially where multiple administrators or delegated user-management roles can modify accounts. Internet exposure matters less than who has administrative access.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The flaw is network reachable but requires high privileges, so insider misuse, compromised admin accounts, or overly broad admin delegation are the main concerns.
Researcher notes
The evidence supports an improper access-control and validation issue, mapped to CWE-284. The public description is concise and does not provide broad exploit telemetry. Avoid assuming impact beyond Dolibarr account takeover without local role, logging, and version evidence.
Mitigation direction
- Identify Dolibarr deployments running v3.3.beta1_20121221 through v13.0.2.
- Review Dolibarr vendor guidance and the referenced fix commit before upgrading.
- Restrict user-management privileges to trusted administrators only.
- Audit recent login renames and password changes for unexpected account ownership changes.
- Require strong administrator authentication and review admin account inventory.
Validation and detection
- Confirm the exact Dolibarr version for each production and staging instance.
- Review admin activity logs for user login edits and password resets.
- Verify in a non-production environment that duplicate login names are rejected.
- Check whether the referenced upstream fix is present in your deployed code.
- Confirm affected accounts have not been renamed or overwritten unexpectedly.
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-25956 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/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:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L1.23.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Dolibarr/dolibarr/commit/c4cba43bade736ab89e31013a6ccee59a6e077eeCVE reference · x_refsource_MISC
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25956CVE reference · x_refsource_MISC
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 Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.