Cyber Resilience

CVE-2023-51311

HighPublic PoC

Published: 20 February 2025

Published
20 February 2025
Modified
04 November 2025
KEV Added
—
Patch
—
CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0014 33.3th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2023-51311 is a high-severity Improper Neutralization of Formula Elements in a CSV File (CWE-1236) vulnerability in Phpjabbers Car Park Booking System. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Malicious File (T1204.002); ranked at the 33.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-15 (Information Output Filtering).

Deeper analysis

CVE-2023-51311 is a CSV Injection vulnerability in PHPJabbers Car Park Booking System version 3.0. The issue arises from insufficient input validation in the Languages section Labels any parameters field within System Options, where user-supplied data is used to construct CSV files. This flaw, associated with CWE-1236, has a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

An authenticated attacker with low privileges can exploit the vulnerability remotely with low complexity and no user interaction required. By injecting malicious payloads into the affected field, the attacker can embed executable formulas or commands in the resulting CSV file, potentially leading to remote code execution when the file is opened in a spreadsheet application like Microsoft Excel.

Packet Storm advisories, such as those at https://packetstorm.news/files/id/176494 and http://packetstormsecurity.com/files/176494/PHPJabbers-Car-Park-Booking-System-3.0-CSV-Injection.html, detail the vulnerability and proof-of-concept exploit. No patches or specific mitigations are described in the provided references.

EU & UK References

Vulnerability details

PHPJabbers Car Park Booking System v3.0 is vulnerable to CSV Injection vulnerability which allows an attacker to execute remote code. The vulnerability exists due to insufficient input validation on Languages section Labels any parameters field in System Options that is…

more

used to construct CSV file.

CWE(s)
CWE-1236

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1204.002 Malicious File Execution
An adversary may rely upon a user opening a malicious file in order to gain execution.
attack.mitre.org →
Why these techniques?

CSV injection enables creation of malicious file (T1204.002) that executes commands on open in spreadsheet apps.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v18.1

CVEs Like This One

CVE-2023-51333Same vendor: Phpjabbers
CVE-2023-51319Same vendor: Phpjabbers
CVE-2023-51302Same vendor: Phpjabbers
CVE-2023-51336Same vendor: Phpjabbers
CVE-2023-51313Same vendor: Phpjabbers
CVE-2026-23873Shared CWE-1236
CVE-2025-56267Shared CWE-1236
CVE-2025-50572Shared CWE-1236
CVE-2023-51316Same vendor: Phpjabbers
CVE-2025-67851Shared CWE-1236

Affected Assets

phpjabbers
car park booking system
3.0

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-10 Information Input Validation good match
prevent

Directly addresses the insufficient input validation in the Languages section by requiring validation mechanisms to block malicious payloads before CSV construction.

SI-15 Information Output Filtering good match
prevent

Filters output in generated CSV files to neutralize injected formulas or commands that could execute in spreadsheet applications.

SI-2 Flaw Remediation good match
prevent

Requires timely remediation of the identified flaw in CSV injection handling to prevent exploitation.

References