Forma LMS up to 4.1.18 /lostpwd response discrepancy

Summaryinfo

A vulnerability marked as problematic has been reported in Forma LMS up to 4.1.18. This impacts an unknown function of the file /lostpwd. The manipulation leads to response discrepancy. This vulnerability is referenced as CVE-2026-26744. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Forma LMS up to 4.1.18. This issue affects an unknown code of the file /lostpwd. The manipulation with an unknown input leads to a response discrepancy vulnerability. Using CWE to declare the problem leads to CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. Impacted is confidentiality. The summary by CVE is:

A user enumeration vulnerability exists in FormaLMS 4.1.18 and below in the password recovery functionality accessible via the /lostpwd endpoint. The application returns different error messages for valid and invalid usernames allowing an unauthenticated attacker to determine which usernames are registered in the system through observable response discrepancy.

The identification of this vulnerability is CVE-2026-26744 since 02/16/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 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.

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Productinfo

Name

• Forma LMS

Version

• 4.1.0
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 4.1.12
• 4.1.13
• 4.1.14
• 4.1.15
• 4.1.16
• 4.1.17
• 4.1.18

CPE 2.3info

• 🔒
• 🔒
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CPE 2.2info

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• 🔒
• 🔒

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Submitinfo

Duplicate

• Submit #XXXXXX: Xxxxxxxx Xxxxxxxx X.x.xx Xxxxxxxxxxx Xxxxxxxx Xxxxxxx Xxxxxxxxxxx (by Brunlorenz)

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