CVE-2023-53924

Name: CVE-2023-53924
Creator: NVD / NIST
Published: 2025-12-17T23:15:51.58+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.7/10EPSS 0.79%

Last modified Jun 17, 2026

CVE-2023-53924 is a high-severity vulnerability rated 8.7/10 on the CVSS scale. UliCMS 2023.1-sniffing-vicuna contains a remote code execution vulnerability that allows authenticated attackers to upload PHP files with .phar extension during profile avatar upload. Attackers can trigger code execution by visiting the uploaded file's location, enabling system command execution through maliciously crafted avatar uploads.. EPSS estimates a 0.79% chance of exploitation in the next 30 days.

Description

UliCMS 2023.1-sniffing-vicuna contains a remote code execution vulnerability that allows authenticated attackers to upload PHP files with .phar extension during profile avatar upload. Attackers can trigger code execution by visiting the uploaded file's location, enabling system command execution through maliciously crafted avatar uploads.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/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

0.79%

51.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Ulicms	Ulicms	2023.1

References

https://web.archive.org/web/20230314183734/https://en.ulicms.de/Product
https://www.exploit-db.com/exploits/51434Exploit
https://www.vulncheck.com/advisories/ulicms-sniffing-vicuna-remote-code-execution-via-avatar-uploadThird Party Advisory
https://www.exploit-db.com/exploits/51434Exploit

Timeline

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

Frequently Asked Questions

What is CVE-2023-53924?

How severe is CVE-2023-53924?

CVE-2023-53924 has a CVSS score of 8.7/10 (HIGH severity). The EPSS model estimates a 0.79% probability of exploitation in the next 30 days.

How do I fix CVE-2023-53924?

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-2023-53924?

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

Scan your code now

Source: NVD / NIST