Security readout for executives and security teams
Plain-English summary
CVE-2021-36543 is a CSRF issue in SeedDMS. If an authenticated user is tricked into visiting a malicious page, an attacker can cause SeedDMS to unlock a document without the user realizing it. The source bundle does not provide a CVSS score or evidence of active exploitation.
Executive priority
Treat as a targeted workflow-integrity risk, not a broad emergency based on the bundle. Prioritize remediation if SeedDMS controls regulated, sensitive, or approval-dependent documents.
Technical view
The flaw affects /op/op.UnlockDocument.php in SeedDMS v5.1.x before 5.1.23 and v6.0.x before 6.0.16. It allows a remote attacker to trigger document unlock actions through an authenticated victim’s browser. The bundle lists no CWE, CVSS vector, or detailed patch notes.
Likely exposure
Exposure is limited to organizations running affected SeedDMS versions with authenticated users who can be socially engineered. Risk is higher where document locking protects sensitive workflows, approvals, or controlled document access.
Exploitation context
The source describes user-enticed CSRF, not unauthenticated direct compromise. The CVE is not listed as KEV in the provided bundle, and no cited source in the bundle confirms active exploitation.
Researcher notes
Evidence is sparse: the bundle provides affected branches, endpoint, impact, and one external write-up, but no CVSS, CWE, exploit status, or vendor advisory details. Avoid assuming broader SeedDMS versions are affected.
Mitigation direction
- Upgrade SeedDMS 5.1.x to 5.1.23 or later.
- Upgrade SeedDMS 6.0.x to 6.0.16 or later.
- Review vendor guidance for any branch-specific fixes.
- Limit access to SeedDMS until affected systems are upgraded.
- Educate users about suspicious links while authenticated.
Validation and detection
- Inventory SeedDMS instances and record exact versions.
- Confirm no instance runs 5.1.x before 5.1.23.
- Confirm no instance runs 6.0.x before 6.0.16.
- Review document unlock logs for unexpected activity.
- Verify upgraded systems include CSRF protection for unlock actions.
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
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.
CVE-2021-36543 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://cyberdivision.medium.com/cve-2021-36543-9622f50c6dcCVE 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.