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CVE-2020-4043

7.7 · HIGH

phpMussel from versions 1.0.0 and less than 1.6.0 has an unserialization vulnerability in PHP's phar wrapper.

Published Jun 10, 2020CWE-502EPSS 2.60%

Overview

CVE-2020-4043 is a high-severity vulnerability. It was published on June 10, 2020 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

phpMussel from versions 1.0.0 and less than 1.6.0 has an unserialization vulnerability in PHP's phar wrapper. Uploading a specially crafted file to an affected version allows arbitrary code execution (discovered, tested, and confirmed by myself), so the risk factor should be regarded as very high. Newer phpMussel versions don't use PHP's phar wrapper, and are therefore unaffected. This has been fixed in version 1.6.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/phpMussel/phpMussel/commit/97f25973433921c1f953430f32d3081adc4851a4GitHubgithub.com/phpMussel/phpMussel/issues/167GitHubgithub.com/phpMussel/phpMussel/pull/173GitHubgithub.com/phpMussel/phpMussel/security/advisories/GHSA-qr95-4mq5-r3fhGitHubgithub.com/phpMussel/phpMussel/security/policy#currently-known-vulnerabilitiesGitHubgithub.com/phpMussel/phpMussel/commit/97f25973433921c1f953430f32d3081adc4851a4GitHubgithub.com/phpMussel/phpMussel/issues/167GitHubgithub.com/phpMussel/phpMussel/pull/173GitHubgithub.com/phpMussel/phpMussel/security/advisories/GHSA-qr95-4mq5-r3fhGitHubgithub.com/phpMussel/phpMussel/security/policy#currently-known-vulnerabilities

How CyberStrike helps

Frequently asked questions

What is CVE-2020-4043?

CVE-2020-4043 is a high-severity vulnerability. It was published on June 10, 2020 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2020-4043?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-4043?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-4043?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-4043 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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