Security readout for executives and security teams
Plain-English summary
SuiteCRM versions before 7.11.19 had a file-upload filtering weakness that could allow stored JavaScript in the web interface. If triggered by CRM users, this could expose sessions or manipulate CRM pages. The sources do not provide CVSS scoring or confirmed active exploitation.
Executive priority
Treat as a near-term CRM hardening task, not an emergency based on current evidence. Prioritize internet-facing or broadly accessible SuiteCRM systems because stored XSS can affect trusted business workflows and user sessions.
Technical view
The CVE describes persistent XSS through a Content-Type filter bypass in SuiteCRM before 7.11.19. The filter blocked text/html but not other JavaScript-capable types such as text/xml. A referenced public write-up concerns SuiteCRM 7.11.18 file-upload bypass behavior.
Likely exposure
Exposure is most likely in SuiteCRM deployments older than 7.11.19, especially where users can upload files through the web interface. The source bundle lists no CPEs or detailed affected-version matrix beyond before 7.11.19.
Exploitation context
CISA KEV is false in the bundle, and no cited source confirms active exploitation. A public technical blog is referenced, so defenders should assume exploit knowledge is public, but not infer widespread attacks from the provided evidence.
Researcher notes
Evidence is limited: no CVSS, CWE, CPE, or detailed vendor advisory is included in the bundle. The strongest technical statement is the Content-Type filter bypass allowing JavaScript-capable uploads, with 7.11.19 identified as the fixed threshold.
Mitigation direction
- Upgrade affected SuiteCRM deployments to 7.11.19 or later.
- Review SuiteCRM 7.11.19 release notes before remediation.
- Check vendor guidance for unsupported or customized deployments.
- Reduce unnecessary upload permissions until remediation is complete.
Validation and detection
- Inventory SuiteCRM instances and record exact versions.
- Confirm no production instance runs below 7.11.19.
- Review upload-capable roles and recent uploaded files.
- Check web logs for suspicious file upload activity.
- Verify remediation through the normal regression test process.
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-2021-39267 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://github.com/salesagility/SuiteCRMCVE reference · x_refsource_MISC
- https://docs.suitecrm.com/admin/releases/7.11.x/#_7_11_19CVE reference · x_refsource_MISC
- https://thanhlocpanda.wordpress.com/2021/07/31/file-upload-bypass-suitecrm-7-11-18/CVE 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.