CVE-2018-1000773

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-09-06 · updated 2026-06-17
Weakness: CWE-20

Description

WordPress version 4.9.8 and earlier contains a CWE-20 Input Validation vulnerability in thumbnail processing that can result in remote code execution due to an incomplete fix for CVE-2017-1000600. This attack appears to be exploitable via thumbnail upload by an authenticated user and may require additional plugins in order to be exploited however this has not been confirmed at this time.

Affected products

WordPress: through 4.9.8

References

http://www.securityfocus.com/bid/105306
https://www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln/
https://youtu.be/GePBmsNJw6Y?t=1763
http://www.securityfocus.com/bid/105306
https://www.theregister.co.uk/2018/08/20/php_unserialisation_wordpress_vuln/
https://youtu.be/GePBmsNJw6Y?t=1763

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