CVE-2018-1000773

Name: CVE-2018-1000773
Creator: NVD / NIST
Published: 2018-09-06T16:29:05.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 7.26%

Last modified Jun 17, 2026

CVE-2018-1000773 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 7.26% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

7.26%

93.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Wordpress	Wordpress	<= 4.9.8

References

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

Timeline

Published: Sep 6, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000773?

How severe is CVE-2018-1000773?

Severity scoring for CVE-2018-1000773 is pending analysis. The EPSS model estimates a 7.26% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000773?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1000773?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST