CVE-2023-2523
Published: 04 May 2023
Summary
CVE-2023-2523 is a high-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in E-Office E-Office. Its CVSS base score is 7.3 (High).
Operationally, ranked in the top 0.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability rated critical exists in Weaver E-Office version 9.5 within the mobile_upload_save functionality of the file App/Ajax/ajax.php. The issue, tracked as CWE-434, stems from improper handling of the upload_quwan parameter and permits unrestricted file uploads. CVSS 3.1 scoring places the flaw at 7.3 with network attack vector, low complexity, and no required authentication or user interaction.
An unauthenticated remote attacker can supply a crafted request to ajax.php?action=mobile_upload_save and upload arbitrary files to the server. Successful exploitation grants the ability to write malicious content, potentially leading to limited impacts on confidentiality, integrity, and availability. Public exploit code has been released, and the vendor did not respond to early disclosure notification.
The associated EPSS score stands at 0.9302. Reference materials consist primarily of exploit disclosure on GitHub and entries in the VulDB database; no official vendor advisory or patch information is provided.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-34003
Vulnerability details
A vulnerability was found in Weaver E-Office 9.5. It has been rated as critical. Affected by this issue is some unknown functionality of the file App/Ajax/ajax.php?action=mobile_upload_save. The manipulation of the argument upload_quwan leads to unrestricted upload. The attack may be…
more
launched remotely. The exploit has been disclosed to the public and may be used. VDB-228014 is the identifier assigned to this vulnerability. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
- 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.