CVE-2023-53933

Serendipity 2.4.0 Authenticated Remote Code Execution via File Upload

Published Dec 17, 2025 CVSS 4.0 · 8.7 High EPSS 1.0% KEV · Not listed
Description
Serendipity 2.4.0 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension. Attackers can upload files with system command payloads to the media upload endpoint and execute arbitrary commands on the server.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:s9y:serendipity:2.4.0:beta1:*:*:*:*:*:*
Type Values Removed Values Added
CPEs cpe:2.3:a:s9y:serendipity:2.4.0:-:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared S9y
S9y serendipity
Vendors & Products S9y
S9y serendipity
Type Values Removed Values Added
Description Serendipity 2.4.0 contains a remote code execution vulnerability that allows authenticated attackers to upload malicious PHP files with .phar extension. Attackers can upload files with system command payloads to the media upload endpoint and execute arbitrary commands on the server.
Title Serendipity 2.4.0 Authenticated Remote Code Execution via File Upload
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Apr 7, 2026, 2:07 PM
Reserved
Dec 16, 2025, 7:22 PM
Status
Analyzed
Published
Dec 17, 2025, 11:15 PM
Modified
Jun 17, 2026, 6:46 AM