CVE-2023-53933
CVSS v3
8.8
HIGH
EPSS Score
1.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2025-12-17
Frequently asked questions
What is 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.
Is CVE-2023-53933 actively exploited?
Active exploitation of CVE-2023-53933 has not been confirmed. Its EPSS score was 1.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-53933?
CVE-2023-53933 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2023-53933 affecting your environment?
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