CVE-2023-53980

Name: CVE-2023-53980
Creator: NVD / NIST
Published: 2025-12-22T22:16:03.71+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.81%

Last modified Jun 17, 2026

CVE-2023-53980 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. 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.. EPSS estimates a 0.81% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

8.7/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.81%

52.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Projectsend	Projectsend	r1605

References

https://www.exploit-db.com/exploits/51238Exploit, Third Party Advisory
https://www.projectsend.org/Product
https://www.vulncheck.com/advisories/projectsend-remote-code-execution-via-file-extension-manipulationExploit, Third Party Advisory
https://www.exploit-db.com/exploits/51238Exploit, Third Party Advisory

Timeline

Published: Dec 22, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-53980?

How severe is CVE-2023-53980?

CVE-2023-53980 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.81% probability of exploitation in the next 30 days.

How do I fix CVE-2023-53980?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-53980?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST