Cyber Resilience

CVE-2023-51336

Phpjabbers Meeting Room Booking System 1.0

Public PoC
Published
20 February 2025
Modified
04 November 2025
Patch / advisory
View advisory
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0062 47th percentile
Risk Priority 65 floored blend · peak EPSS

Summary

CVE-2023-51336 is a high-severity Improper Neutralization of Formula Elements in a CSV File (CWE-1236) vulnerability in Phpjabbers Meeting Room Booking System. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique User Execution (T1204); ranked at the 47th 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 map to SI-15 (Information Output Filtering) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2023-51336 is a CSV injection vulnerability in PHPJabbers Meeting Room Booking System v1.0. The flaw arises from insufficient input validation in the Languages section's Labels any parameters field within System Options, where user-supplied data is used to construct CSV files without proper sanitization. This allows injection of malicious payloads, such as formulas, leading to remote code execution. The vulnerability is associated with CWE-1236 and carries 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 this issue remotely over the network with low complexity and no user interaction required. By injecting crafted input into the affected field, the attacker can embed executable code in the resulting CSV file, which executes when opened in applications like spreadsheet software, achieving remote code execution with high impacts on confidentiality, integrity, and availability.

Advisories detailing the vulnerability, including a proof-of-concept, are available via PacketStormsecurity references such as https://packetstorm.news/files/id/176518 and http://packetstormsecurity.com/files/176518/PHPJabbers-Meeting-Room-Booking-System-1.0-CSV-Injection.html. The vendor's demo page at https://www.phpjabbers.com/meeting-room-booking-system/#sectionDemo provides additional context on the affected software, though no specific patches or mitigations are detailed in the provided information.

EU & UK References

Vulnerability Data

PHPJabbers Meeting Room Booking System v1.0 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 Techniques

T1204 User Execution Execution
An adversary may rely upon specific actions by a user in order to gain execution.
attack.mitre.org →
T1204.002 Malicious File Execution
An adversary may rely upon a user opening a malicious file in order to gain execution.
attack.mitre.org →
T1566 Phishing Initial Access
Adversaries may send phishing messages to gain access to victim systems.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-48207Same vendor: Phpjabbers
CVE-2023-51298Same vendor: Phpjabbers
CVE-2023-51338Same product: Phpjabbers Meeting Room Booking System
CVE-2023-51319Same vendor: Phpjabbers
CVE-2023-51302Same vendor: Phpjabbers
CVE-2023-51311Same vendor: Phpjabbers
CVE-2023-51333Same vendor: Phpjabbers
CVE-2023-51332Same product: Phpjabbers Meeting Room Booking System
CVE-2024-45084Shared CWE-1236
CVE-2024-47485Shared CWE-1236

Affected Assets

phpjabbers
meeting room booking system
1.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.10

Mitigating Controls (NIST 800-53 r5) AI

SI-15 Information Output Filtering good match

Output filtering/validation directly stops unneutralized formula elements from being written into CSV files.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require output neutralization for untrusted CSV content to block formula injection.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect formula injection but does not itself implement the mitigation.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and output encoding that directly prevents formula injection in CSV exports.

A.8.26 Application security requirements partial match
prevents

Application security requirements include rules for safe CSV generation and handling of untrusted data.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles encourage safe data export design but do not specifically address CSV formula neutralization.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly require neutralization of special characters when writing CSV files.

References