Cyber Resilience

CVE-2024-40509

HighPublic PoC

Published: 27 September 2024

Published
27 September 2024
Modified
29 September 2025
KEV Added
—
Patch
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CVSS Score v3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0777 92.1th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-40509 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Openpetra Openpetra. Its CVSS base score is 7.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 7.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

Deeper analysis

CVE-2024-40509 is a cross-site scripting vulnerability, tracked under CWE-79, that affects openPetra version 2023.02. The flaw resides in the serverMFinDev.asmx function and carries a CVSS 3.1 base score of 7.3, reflecting network attack vector, low complexity, and no required privileges or user interaction.

A remote attacker can exploit the issue by supplying crafted input to the affected endpoint, enabling the attacker to obtain sensitive information from the application.

The two referenced GitHub URLs point to the openPetra project repository and a separate disclosure entry; neither contains advisory text or patch details. The associated EPSS score has remained flat at 0.0777 with no material increase since publication.

EU & UK References

Vulnerability details

Cross Site Scripting vulnerability in openPetra v.2023.02 allows a remote attacker to obtain sensitive information via the serverMFinDev.asmx function.

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1539 Steal Web Session Cookie Credential Access
An adversary may steal web application or service session cookies and use them to gain access to web applications or Internet services as an authenticated user without needing credentials.
attack.mitre.org →
Why these techniques?

XSS vulnerability in public-facing web service (serverMFinDev.asmx) enables exploitation (T1190) and stealing web session cookies from authenticated users via injected JavaScript payload (T1539).

Affected Assets

openpetra
openpetra
2023.02

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References