LMS Management System GET Parameter dbrecover.php cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k4.74-

Summaryinfo

A vulnerability was found in LMS Management System. It has been classified as problematic. Affected is an unknown function of the file dbrecover.php of the component GET Parameter Handler. Performing a manipulation results in cross site scripting. This vulnerability is known as CVE-2026-40457. Remote exploitation of the attack is possible. No exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability classified as problematic has been found in LMS Management System (unknown version). This affects an unknown code block of the file dbrecover.php of the component GET Parameter Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

A Reflected Cross-Site Scripting (XSS) vulnerability exists in LMS (LAN Management System) before commit 9c5651b in the "dbrecover.php" and "netremap.php" modules where unsanitized GET parameters are directly embedded into HTML output. This allows an attacker to inject arbitrary JavaScript when an authenticated user clicks a crafted link, provided the required conditions (such as a network defined in the system) are met.

The weakness was published by Tymoteusz Dominik as 9c5651b39bfd086cc34fc9a78ddaa8c0815af114. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-40457 since 04/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:dbrecover.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch 9c5651b is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-37876). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

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: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Google Hack: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 9c5651b

Timelineinfo

04/13/2026 CVE reserved
06/18/2026 +66 days Advisory disclosed
06/18/2026 +0 days VulDB entry created
06/18/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 9c5651b39bfd086cc34fc9a78ddaa8c0815af114
Researcher: Tymoteusz Dominik
Status: Confirmed

CVE: CVE-2026-40457 (🔒)
GCVE (CVE): GCVE-0-2026-40457
GCVE (VulDB): GCVE-100-372195
EUVD: 🔒

Entryinfo

Created: 06/18/2026 15:07
Updated: 06/18/2026 17:04
Changes: 06/18/2026 15:07 (69), 06/18/2026 17:04 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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