Arbitrary file upload in Projectsend
CVE-2023-53980
ProjectSend r1605 contains a remote code execution vulnerability that allows attackers to upload malicious files by manipulating file extensions. Attackers can upload shell scripts with disguised extensions through the upload.process.php endpoint to execute arbitrary commands on the server.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (61.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Projectsend — versions r1605
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51238 (Exploit, Third Party Advisory, exploit)
- www.projectsend.org/ (Product, product)
- www.vulncheck.com/advisories/projectsend-remote-code-execution-via-file-extensi… (Exploit, Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2023-53980?
- CVE-2023-53980 is a critical-severity vulnerability in Projectsend, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2025-12-22.
- How severe is CVE-2023-53980?
- Critical severity. CVSS v3 base score is 9.8 out of 10.