CVE-2024-8856
Published: 16 November 2024
Summary
CVE-2024-8856 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Revmakx Backup And Staging By Wp Time Capsule. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 0.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The Backup and Staging by WP Time Capsule plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the UploadHandler.php file and the absence of direct file access prevention. This flaw affects all versions through 1.22.21 and is tracked under CWE-434, carrying a CVSS 3.1 score of 9.8.
Unauthenticated attackers can exploit the issue over the network by uploading arbitrary files to the server, which may enable remote code execution on the affected WordPress site.
Public references, including Wordfence and WordPress plugin repository changesets, indicate that the vulnerability is addressed by updating to a version newer than 1.22.21; administrators should apply the available patch and verify that uploaded files are no longer stored in web-accessible locations without proper controls.
The associated EPSS score stands at 0.9315 with no indicated change from its peak value.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-49578
Vulnerability details
The Backup and Staging by WP Time Capsule plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the the UploadHandler.php file and no direct file access prevention in all versions up to, and…
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including, 1.22.21. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Requiring identifiable owners for portable devices reduces the attack surface for unrestricted uploads of dangerous file types via anonymous media.
Dangerous file uploads can be detonated in the chamber to determine malice before any production write or execution occurs.
Prevents unrestricted writing of arbitrary or malicious firmware by keeping hardware write-protect enabled except under tightly controlled manual procedures.
Scans files from external sources on download/open/execute, blocking unrestricted uploads of dangerous file types.