CVE-2026-54857: WordPress Quirky theme <= 1.23 - PHP Object Injection vulnerability

Q: Who can exploit this issue?

The issue is unauthenticated, so an attacker does not need a WordPress account or prior access to target an affected site.

Q: Which installations are affected?

Sites using the Quirky WordPress theme version 1.23 or earlier are affected according to the available information.

Q: How severe is the potential impact?

The vulnerability is rated critical with a CVSS score of 9.8. The supplied vector indicates network-reachable exploitation with low attack complexity and potential high impact to confidentiality, integrity, and availability.

Published Oct 29, 2026

Updated

Unauthenticated PHP Object Injection in Quirky <= 1.23 versions.

Event History

Oct 29, 2026

CVE Published

via MITRE·03:24 PM

Data Sourced

via MITRE·03:24 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·04:18 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Who can exploit this issue?

The issue is unauthenticated, so an attacker does not need a WordPress account or prior access to target an affected site.

Which installations are affected?

Sites using the Quirky WordPress theme version 1.23 or earlier are affected according to the available information.

How severe is the potential impact?

The vulnerability is rated critical with a CVSS score of 9.8. The supplied vector indicates network-reachable exploitation with low attack complexity and potential high impact to confidentiality, integrity, and availability.

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Contact

SecAlerts Pty Ltd.
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Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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