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.

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

EPSS: 0.009 (59.5th percentile) — read the EPSS interpretation.

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.

Affected products

Projectsend — versions r1605

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

disclosure@vulncheck.com (Exploit, Third Party Advisory, exploit)
disclosure@vulncheck.com (Product, product)
disclosure@vulncheck.com (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.