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WordPress WP Downgrade Cross Site Scripting

WordPress WP Downgrade Cross Site Scripting
Posted Apr 7, 2022
Authored by Taurus Omar

WordPress WP Downgrade plugin versions prior to 1.2.3 suffer from a persistent cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2022-1001
SHA-256 | 69670eeb08507b6e52ce6923413e57dcc50f60c892e1e6e96f503732e4cb8844

WordPress WP Downgrade Cross Site Scripting

Change Mirror Download
Tittle:
WordPress Plugin WP Downgrade < 1.2.3 - Admin + Stored Cross-Site Scripting

References:
CVE-2022-1001

Author:
Taurus Omar

Description:
The plugin only perform client side validation of its "WordPress Target Version" settings, but does not sanitise and escape it server side, allowing high privilege users such as admin to perform Cross-Site attacks even when the unfiltered_html capability is disallowed.

Affects Plugins:
wp-downgrade - Fixed in version 1.2.3

Proof of Concept:
Access the settings of the plugin (/wp-admin/options-general.php?page=wp_downgrade) and remove the max length as well as pattern attribute on the "WordPress Target Version" settings field, then put the following payload in it and save: <script>alert(/XSS/)</script>

Classification
Type XSS
OWASP top 10 A7: Cross-Site Scripting (XSS)
CWE-79

wpScan:
https://wpscan.com/vulnerability/85582b4f-a40a-4394-9834-0c88c5dc57ba

TracWordpress:
https://plugins.trac.wordpress.org/changeset/2696091
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