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The Broken Link Checker plugin for WordPress is vulnerable to deserialization of untrusted input via the '$log_file' value in versions up to, and including 1.11.16. This makes it possible for authenticated attackers with administrative privileges and above to call files using a PHAR wrapper that will deserialize the data and call arbitrary PHP Objects that can be used to perform a variety of malicious actions granted a POP chain is also present. It also requires that the attacker is successful in uploading a file with the serialized payload.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Broken Link Checker Plugin | — | Update broken-link-checker plugin to version 1.11.17, or a newer patched version | May 15, 2025 | Jul 18, 2022 |
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