CVE-2023-53933

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://docs.s9y.org/	Product
https://www.exploit-db.com/exploits/51372	Exploit Third Party Advisory VDB Entry
https://www.vulncheck.com/advisories/serendipity-authenticated-remote-code-execution-via-file-upload	Third Party Advisory Exploit
https://www.exploit-db.com/exploits/51372	Exploit Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:s9y:serendipity:2.4.0:-:*:*:*:*:*:*

History

24 Dec 2025, 16:52

Type	Values Removed	Values Added
References	~~() https://docs.s9y.org/ -~~	() https://docs.s9y.org/ - Product
References	~~() https://www.exploit-db.com/exploits/51372 -~~	() https://www.exploit-db.com/exploits/51372 - Exploit, Third Party Advisory, VDB Entry
References	~~() https://www.vulncheck.com/advisories/serendipity-authenticated-remote-code-execution-via-file-upload -~~	() https://www.vulncheck.com/advisories/serendipity-authenticated-remote-code-execution-via-file-upload - Third Party Advisory, Exploit
First Time		S9y serendipity S9y
CPE		cpe:2.3:a:s9y:serendipity:2.4.0:-::::::

18 Dec 2025, 19:16

Type	Values Removed	Values Added
References	~~() https://www.exploit-db.com/exploits/51372 -~~	() https://www.exploit-db.com/exploits/51372 -

17 Dec 2025, 23:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-17 23:15

Updated : 2025-12-24 16:52

NVD link : CVE-2023-53933

Mitre link : CVE-2023-53933

CVE.ORG link : CVE-2023-53933

JSON object : View

Products Affected

s9y

serendipity

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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