s9y Serendipity 2.4.0 Media Upload Endpoint unrestricted upload

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in s9y Serendipity 2.4.0. This affects an unknown part of the component Media Upload Endpoint. Executing a manipulation can lead to unrestricted upload. This vulnerability appears as CVE-2023-53933. The attack may be performed from remote. In addition, an exploit is available.

Detailsinfo

A vulnerability has been found in s9y Serendipity 2.4.0 and classified as critical. This vulnerability affects some unknown functionality of the component Media Upload Endpoint. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was presented by Mirabbas Ağalarov as 51372. The advisory is shared for download at exploit-db.com. This vulnerability was named CVE-2023-53933 since 12/16/2025. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1608.002.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Exploit-DB (51372). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.2

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Exploit-DB: 🔒

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

12/16/2025 CVE reserved
12/18/2025 +2 days Advisory disclosed
12/18/2025 +0 days VulDB entry created
12/18/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: 51372
Researcher: Mirabbas Ağalarov
Status: Not defined

CVE: CVE-2023-53933 (🔒)
GCVE (CVE): GCVE-0-2023-53933
GCVE (VulDB): GCVE-100-337108
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 12/18/2025 08:35
Changes: 12/18/2025 08:35 (81)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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