Security readout for executives and security teams
Plain-English summary
CVE-2021-3628 is an authenticated cross-site scripting flaw in OpenKM Document Management Community 6.3.10. A logged-in attacker could inject script through the uuid parameter, potentially affecting another user who interacts with crafted content. Business impact is limited but relevant where OpenKM stores sensitive documents or has privileged users.
Executive priority
Treat this as a moderate remediation item. It is not currently evidenced as actively exploited, but document systems often contain sensitive information, so affected OpenKM 6.3.10 instances should be identified and remediated through vendor guidance.
Technical view
The issue is CWE-79 XSS in OpenKM Community Edition 6.3.10. The CVSS 3.1 score is 4.6, with network access, low complexity, low privileges required, and user interaction required. The source bundle identifies the uuid parameter as the injection point but does not provide patch details or exploit mechanics.
Likely exposure
Exposure appears limited to organizations running OpenKM Document Management Community version 6.3.10. Risk is higher when authenticated access is broadly available, the application is internet-facing, or privileged document-management users routinely interact with attacker-controlled records or links.
Exploitation context
The CVE record and bundle do not show CISA KEV listing or active exploitation evidence. Exploitation requires an authenticated attacker and user interaction, which lowers urgency compared with unauthenticated remote code execution but still creates confidentiality and integrity concerns.
Researcher notes
Evidence is sufficient for affected product, version, weakness type, and CVSS characteristics. The provided sources do not confirm a fixed version, active exploitation, or detailed remediation. Avoid broad claims beyond OpenKM Community 6.3.10 and the uuid parameter.
Mitigation direction
- Identify any OpenKM Community 6.3.10 instances in production or test environments.
- Review INCIBE and OpenKM issue 278 for vendor-confirmed remediation guidance.
- Use the OpenKM migration guide for any approved version migration path.
- Restrict OpenKM access to trusted users and networks until remediation is confirmed.
- Monitor vendor sources for patch or upgrade clarification.
Validation and detection
- Confirm the deployed OpenKM edition and version are Community 6.3.10.
- Check whether OpenKM is internet-facing or reachable by untrusted authenticated users.
- Review access logs for suspicious authenticated activity around vulnerable document workflows.
- Verify remediation by confirming vendor-guided upgrade or mitigation is applied.
- Retest only in an authorized environment without capturing exploit payloads.
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.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-3628 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
- 4.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
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:L/UI:R/S:U/C:L/I:L/A:N2.12.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.6MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.incibe-cert.es/en/early-warning/security-advisories/openkm-document-management-community-vulnerable-cross-siteCVE reference · x_refsource_CONFIRM
- https://github.com/openkm/document-management-system/issues/278CVE reference · x_refsource_CONFIRM
- https://docs.openkm.com/kcenter/view/okm-6.3-com/migration-guide.htmlCVE reference · x_refsource_CONFIRM
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 Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.