MasterStudy LMS Pro Plugin up to 4.7.0 on WordPress stm_lms_add_assignment_attachment unrestricted upload

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in MasterStudy LMS Pro Plugin up to 4.7.0 on WordPress. This issue affects the function stm_lms_add_assignment_attachment. The manipulation leads to unrestricted upload. This vulnerability is documented as CVE-2025-4800. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in MasterStudy LMS Pro Plugin up to 4.7.0 on WordPress. It has been rated as critical. This issue affects the function stm_lms_add_assignment_attachment. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The MasterStudy LMS Pro plugin for WordPress is vulnerable to arbitrary file uploads due to a missing file type validation in the stm_lms_add_assignment_attachment function in all versions up to, and including, 4.7.0. This makes it possible for authenticated attackers, with Subscriber-level access and above, to upload arbitrary files on the affected site's server, which may make remote code execution possible.

The weakness was released by The Master. It is possible to read the advisory at wordfence.com. The identification of this vulnerability is CVE-2025-4800 since 05/15/2025. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/28/2025). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

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

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector: 🔍

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: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/15/2025 🔍
05/27/2025 +12 days 🔍
05/27/2025 +0 days 🔍
05/28/2025 +1 days 🔍

Sourcesinfo

Advisory: wordfence.com
Researcher: The Master
Status: Not defined

CVE: CVE-2025-4800 (🔍)
GCVE (CVE): GCVE-0-2025-4800
GCVE (VulDB): GCVE-100-310391

Entryinfo

Created: 05/27/2025 20:41
Updated: 05/28/2025 14:15
Changes: 05/27/2025 20:41 (53), 05/28/2025 14:15 (13)
Complete: 🔍
Cache ID: 216::103

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