Security readout for executives and security teams
Plain-English summary
CVE-2020-29593 is a stored cross-site scripting issue in Orchard before 1.10. A malicious value in the Media Settings allowed file types field can run script when a user uploads a blocked file type and sees the error message.
Executive priority
Treat this as a moderate CMS integrity and account-risk issue. Prioritize externally exposed or business-critical Orchard sites, especially where several users can administer media settings.
Technical view
The source describes unsanitized handling of the Media Settings Allowed File Types list in Orchard before 1.10. A crafted entry can be reflected in the disallowed-file upload error path, causing browser script execution in the victim user's session.
Likely exposure
Exposure is most likely in Orchard CMS deployments before 1.10 where an attacker can modify Media Settings or influence that configuration. Internet-facing CMS administration increases business risk, but the source bundle does not define authentication requirements.
Exploitation context
The CVE is not listed as KEV in the provided bundle. No cited source in the bundle states active exploitation. The credible abuse scenario is stored XSS triggered through a media upload error display, not direct server takeover.
Researcher notes
Evidence is limited: the bundle gives no CVSS score, CWE, CPE, exploit status, or detailed patch note. The key facts are Orchard before 1.10, Media Settings allowed file types, and XSS on disallowed upload error display.
Mitigation direction
- Identify Orchard CMS instances and confirm whether any run before version 1.10.
- Review OrchardCMS release guidance and upgrade affected deployments to a fixed supported release.
- Restrict Media Settings administration to trusted users only.
- Review recent Media Settings changes for suspicious allowed file type values.
Validation and detection
- Check application version records for Orchard versions before 1.10.
- Inspect Media Settings allowed file types for unexpected markup or script-like content.
- Test the disallowed upload error path in a safe staging environment.
- Review logs for unusual media settings changes or admin account activity.
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
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CVE-2020-29593 mapping review
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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://burninatorsec.blogspot.com/2021/04/cve-2020-29592-and-cve-2020-29593.htmlCVE reference · x_refsource_MISC
- https://github.com/OrchardCMS/Orchard/releasesCVE 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.