Moodle Start Page Preference access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Moodle (Learning Management Software) (the affected version is unknown). It has been declared as critical. This vulnerability affects some unknown functionality of the component Start Page Preference. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The vulnerability was found Moodle which exists due to insufficient limitations on the "start page" preference. A remote attacker can set that preference for another user. The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The weakness was presented 02/18/2023. The advisory is available at This vulnerability was named CVE-2023-23923 since 01/19/2023. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/18/2023). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at





  • open-source

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.2
NVD Vector: 🔒



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


Class: Access control
CWE: CWE-284 / CWE-266
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔒



01/19/2023 CVE reserved
02/18/2023 +30 days Advisory disclosed
02/18/2023 +0 days VulDB entry created
03/18/2023 +28 days VulDB last update



Status: Confirmed

CVE: CVE-2023-23923 (🔒)


Created: 02/18/2023 07:57 AM
Updated: 03/18/2023 03:53 PM
Changes: 02/18/2023 07:57 AM (39), 03/18/2023 03:53 PM (11)
Complete: 🔍


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