CVE-2023-31689
Wcms 0.3.2
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-31689 is a critical-severity Unrestricted Upload of File with Dangerous Type (CWE-434) vulnerability in Wcms Wcms. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Data Obfuscation (T1001); ranked in the top 3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2023-31689 is an unrestricted file upload vulnerability in Wcms version 0.3.2. The flaw resides in the web application backend component at /wcms/wex/html.php, where the finish and textAreaCode parameters accept crafted input that permits writing arbitrary strings to attacker-chosen filenames, uploading any file type, and placing executable code that can be invoked to trigger command execution. The issue is tracked under CWE-434 and carries a CVSS 3.1 score of 9.8.
Unauthenticated remote attackers can exploit the vulnerability over the network by sending a single malicious request to the affected endpoint. Successful exploitation grants the ability to upload and execute arbitrary scripts, resulting in full compromise of the confidentiality, integrity, and availability of the server.
Public references consist of GitHub issue reports that document the flaw but contain no statements from the maintainer regarding patches or mitigation steps. The associated EPSS score rose from low values to a peak of 0.0585 before receding to the current 0.0123.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-35984
Vulnerability Data
In Wcms 0.3.2, an attacker can send a crafted request from a vulnerable web application backend server /wcms/wex/html.php via the finish parameter and the textAreaCode parameter. It can write arbitrary strings into custom file names and upload any files, and…
more
write malicious code to execute scripts to trigger command execution.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V5.1.1
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.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Hardened configuration baselines can enforce allowed file types and processing rules.
Restricting execution of unauthorized software directly blocks dangerous uploaded files from running.
Secure development practices include input validation and file-type restrictions that prevent this weakness.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.