CVE-2025-25221

Critical

Published: 18 February 2025

Published

18 February 2025

Modified

15 September 2025

KEV Added

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Patch

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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0001 3.2th percentile

Risk Priority 20 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2025-25221 is a critical-severity SQL Injection (CWE-89) vulnerability in Luxsoft Luxcal Web Calendar. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 3.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-25221 is an SQL injection vulnerability (CWE-89) affecting the LuxCal Web Calendar software in versions prior to 5.3.3M for the MySQL variant and prior to 5.3.3L for the SQLite variant. The flaw resides in the pdf.php component and was published on 2025-02-18 with a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

A remote, unauthenticated attacker can exploit this vulnerability over the network with low attack complexity and no user interaction required. Successful exploitation allows the attacker to delete, alter, or retrieve sensitive information from the underlying database.

Advisories and patches for mitigation are detailed in the referenced sources, including the Japan Vulnerability Notes entry at https://jvn.jp/en/jp/JVN26024080/, the official download page at https://www.luxsoft.eu/?download, and a related forum discussion at https://www.luxsoft.eu/lcforum/viewtopic.php?pid=1984#p1984. Upgrading to the patched versions—5.3.3M for MySQL or 5.3.3L for SQLite—is the primary remediation step.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-4854

Vulnerability details

The LuxCal Web Calendar prior to 5.3.3M (MySQL version) and prior to 5.3.3L (SQLite version) contains an SQL injection vulnerability in pdf.php. If this vulnerability is exploited, information in a database may be deleted, altered, or retrieved.

CWE(s): CWE-89

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 →

Why these techniques?

SQL injection in public-facing pdf.php component of web calendar software directly enables remote unauthenticated exploitation of public-facing applications.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0