CVE-2023-6827
Published: 15 December 2023
Summary
CVE-2023-6827 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in G5Plus Essential Real Estate. Its CVSS base score is 7.5 (High).
Operationally, ranked in the top 6.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
The Essential Real Estate plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the ajaxUploadFonts function in versions up to and including 4.3.5. This flaw, tracked under CWE-434, affects the fonts.class.php component and carries a CVSS 3.1 score of 7.5; CVE-2023-6140 is noted as a duplicate.
Authenticated attackers with subscriber-level privileges or above can exploit the issue over the network to upload arbitrary files to the server, which may enable remote code execution with high impact on confidentiality, integrity, and availability.
Public references include a Wordfence advisory and the plugin's Trac changeset 3009780, which documents the corrective update released to address the file validation weakness.
The associated EPSS score remains flat at a peak of 0.0963 with no material rise after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-59037
Vulnerability details
The Essential Real Estate plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation on the 'ajaxUploadFonts' function in versions up to, and including, 4.3.5. This makes it possible for authenticated attackers with subscriber-level capabilities…
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or above, to upload arbitrary files on the affected site's server which may make remote code execution possible. CVE-2023-6140 appears to be a duplicate of this issue.
- 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.