CVE-2023-53933: Serendipity 2.4.0 Authenticated Remote Code Execution via File Upload

Published Dec 17, 2025
·
Updated

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.

Affected Software

2 affected components
serendipity Serendipity
S9Y Serendipity=2.4.0

Event History

Dec 17, 2025
CVE Published
via MITRE·10:44 PM
Data Sourced
via MITRE·10:44 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:15 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2023-53933?

CVE-2023-53933 is categorized as a critical severity vulnerability due to its potential for remote code execution by authenticated attackers.

2

How do I fix CVE-2023-53933?

To mitigate CVE-2023-53933, it is recommended to update Serendipity to the latest version, which addresses this vulnerability.

3

Who is affected by CVE-2023-53933?

CVE-2023-53933 affects users of Serendipity version 2.4.0.

4

What actions can attackers perform with CVE-2023-53933?

Attackers can upload malicious PHP files through the media upload endpoint and execute arbitrary commands on the server with CVE-2023-53933.

5

Is CVE-2023-53933 exploitable without authentication?

CVE-2023-53933 requires authentication for exploitation, meaning that only authenticated users can trigger the vulnerability.

Contact

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