Unrestricted file upload in wpazleen Post Export Import with Media
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
The Post Export Import with Media plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 1.13.1 via the import_media_file_secure function. This is due to insufficient file extension validation caused by a trailing-dot filename bypass, where the extension allow-list check in ajax_import_media_start() uses pathinfo() on the raw ZIP entry name (e.g., 'shell.php.'), which returns an empty string for the extension, causing the allow-list guard to be skipped and the file to be extracted to a temporary location, after which import_media_file_secure() copies it into the WordPress uploads directory without re-validating the extension. This makes it possible for authenticated attackers, with administrator-level access and above, to upload files that may be executable, which makes remote code execution possible.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-13430
- 2026-10-03 Alias added: GHSA-mxq7-wpp5-2fc9
References
Other 7
- https://www.wordfence.com/threat-intel/vulnerabilities/id/42f94f80-6157-4778-ad69-184943134fd2?source=cve
- https://plugins.trac.wordpress.org/browser/post-export-import-with-media/tags/1.13.1/includes/class-media-handler.php#L364
- https://plugins.trac.wordpress.org/browser/post-export-import-with-media/tags/1.13.1/includes/class-media-handler.php#L789
- https://plugins.trac.wordpress.org/browser/post-export-import-with-media/tags/1.13.1/includes/class-media-handler.php#L389
- https://plugins.trac.wordpress.org/browser/post-export-import-with-media/tags/1.13.1/includes/class-media-handler.php#L444
- https://plugins.trac.wordpress.org/browser/post-export-import-with-media/tags/1.13.1/includes/class-media-handler.php#L268
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3600506%40post-export-import-with-media&new=3600506%40post-export-import-with-media
More wpazleen vulnerabilities
- TI-2026-83523 Arbitrary file upload in SimpleForm WordPress plugin CVSS 3.1CRITICAL 9.8
- TI-2026-73817 SimpleForm Unauthenticated Privilege Escalation via wp_capabilities CVSS 3.1CRITICAL 9.8
- TI-2026-73821 Post Export Import with Media: Authenticated PHP Object Injection CVSS 3.1HIGH 7.2
- TI-2026-76039 Path traversal in Post Export Import with Media WordPress plugin CVSS 3.1MEDIUM 4.9
- TI-2026-70261 Path traversal in Post Export Import with Media allows file reads CVSS 3.1MEDIUM 4.9
Sources
- CVE-2026-13430 · CVE Program
- CVE-2026-13430 · NVD
- FIRST EPSS
- GHSA-mxq7-wpp5-2fc9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences