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 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).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190). What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

Directly prevents SQL injection exploitation in pdf.php by validating and sanitizing untrusted inputs before database processing.

SI-2 Flaw Remediation good match

prevent

Mandates timely flaw remediation through upgrading LuxCal to patched versions 5.3.3M (MySQL) or 5.3.3L (SQLite).

RA-5 Vulnerability Monitoring and Scanning partial match

preventdetect

Vulnerability scanning identifies the SQL injection in pdf.php for prioritized patching and mitigation.

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

NVD Description

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.

Deeper analysisAI

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.