What happened
Improper sanitization in the extension file names is present in Drupal core.
Affected versions
Drupal core: See original advisory Fixed: See vendor advisory.
Why it matters
This source correlation may provide earlier visibility while structured CVE metadata is still being updated.
Detection & mitigation
- Review the original advisory and validate affected versions.
- Apply vendor-provided updates or mitigations when available.
Public PoC references
RepositoryAuthorFirst seenReference
PoC-in-GitHub · Dungsocool/CVE-2020-13671-oldCVE-2020-13671 - Drupal RCE via File Upload Vulnerability Analysis and PoC★ 0Dungsocool2026-08-22CandidatePoC-in-GitHub · Dungsocool/CVE-2020-13671CVE-2020-13671 - Drupal RCE via File Upload Vulnerability Analysis and PoC★ 0Dungsocool2026-08-22CandidatePoC-in-GitHub · ivanesk315/CVE-2020-13671★ 0ivanesk3152026-09-10CandidateSource timeline
Discovered through CISA Known Exploited VulnerabilitiesView source ↗
Added to CISA Known Exploited Vulnerabilities catalogView source ↗
Added to CISA Known Exploited Vulnerabilities catalogView source ↗
Added to CISA Known Exploited Vulnerabilities catalogView source ↗
Record history
Record created from the first normalized source observation.
Metadata and source references refreshed.