CVE-2026-0643
Published: 07 January 2026
Summary
CVE-2026-0643 is a medium-severity Improper Access Control (CWE-284) vulnerability in Projectworlds House Rental And Property Listing Project. Its CVSS base score is 6.9 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 28.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and AC-3 (Access Enforcement).
Deeper analysis
CVE-2026-0643 is an unrestricted file upload vulnerability in projectworlds House Rental and Property Listing version 1.0. The flaw affects an unknown function within the Signup component, specifically in the file /app/register.php?action=reg, where manipulation of the "image" argument enables the upload of arbitrary files. Published on 2026-01-07, it is associated with CWEs-284 (Improper Access Control) and CWE-434 (Unrestricted Upload of File with Dangerous Type), and carries a CVSS v3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
Remote attackers require no privileges or user interaction to exploit this vulnerability over the network with low complexity. Successful exploitation allows limited impacts on confidentiality, integrity, and availability, such as uploading malicious files that could lead to further compromise depending on server configuration and file handling.
Advisories and additional details, including a published exploit, are documented in references such as https://vuldb.com/?ctiid.339686, https://vuldb.com/?id.339686, https://vuldb.com/?submit.732563, and https://github.com/1uzpk/cve/issues/4. The availability of a public exploit indicates potential for immediate misuse by threat actors.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-1239
Vulnerability details
A flaw has been found in projectworlds House Rental and Property Listing 1.0. Impacted is an unknown function of the file /app/register.php?action=reg of the component Signup. This manipulation of the argument image causes unrestricted upload. Remote exploitation of the attack…
more
is possible. The exploit has been published and may be used.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unrestricted file upload in public-facing web app directly enables exploitation of the application (T1190) to deploy a web shell (T1100/T1505.003) for execution and persistence.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly requires validation of the image argument and file content/type before acceptance, blocking the unrestricted upload flaw in register.php.
Enforces access-control decisions on the signup upload function so that only authorized, validated operations are permitted rather than allowing unauthenticated arbitrary file writes.
Deploys malicious-code protection mechanisms that scan or sandbox uploaded files, mitigating the CWE-434 risk of dangerous file types reaching the server.