How to fix CVE-2024-21623?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Vendor patch is available.

Is Otclient affected by CVE-2024-21623?

Organizations using OTCLient face critical risk from CVE-2024-21623, a injection vulnerability rated CVSS 9.8. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise.

Otclient CVE-2024-21623

CRITICAL

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2024-01-02 [email protected]

Information Disclosure Otclient

9.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:33 vuln.today

Patch released

Mar 28, 2026 - 19:33 nvd

Patch available

PoC Detected

Nov 21, 2024 - 08:54 vuln.today

Public exploit code

CVE Published

Jan 02, 2024 - 21:15 nvd

CRITICAL 9.8

DescriptionNVD

OTCLient is an alternative tibia client for otserv. Prior to commit db560de0b56476c87a2f967466407939196dd254, the /mehah/otclient "Analysis - SonarCloud" workflow is vulnerable to an expression injection in Actions, allowing an attacker to run commands remotely on the runner, leak secrets, and alter the repository using this workflow. Commit db560de0b56476c87a2f967466407939196dd254 contains a fix for this issue.

AnalysisAI

OTCLient is an alternative tibia client for otserv. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-74. OTCLient is an alternative tibia client for otserv. Prior to commit db560de0b56476c87a2f967466407939196dd254, the /mehah/otclient "Analysis - SonarCloud" workflow is vulnerable to an expression injection in Actions, allowing an attacker to run commands remotely on the runner, leak secrets, and alter the repository using this workflow. Commit db560de0b56476c87a2f967466407939196dd254 contains a fix for this issue. Affected products include: Mehah Otclient.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

CVE-2024-21623 vulnerability details – vuln.today

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Otclient CVE-2024-21623

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

Technical ContextAI

RemediationAI

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External POC / Exploit Code