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31 lines
913 B
Markdown
31 lines
913 B
Markdown
# CVE-2021-36873
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## Description
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Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versions <= 1.2.11). Vulnerable parameter: `&blockcountry_blockmessage`.
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## CVSS (Vector and Score)
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CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N - 5.5 MEDIUM
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## Affected Application
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WordPress iQ Block Country plugin
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## Affected Version
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<= 1.2.11
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## Total Installation
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30,000+
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## Steps to Reproduce
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1. Login as administrator
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2. Go to http://localhost/wp-admin/options-general.php?page=iq-block-country%2Flibs%2Fblockcountry-settings.php
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3. Find `Message to display when people are blocked:` form
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4. Input `</textarea><script>alert(1)</script>`
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5. Scroll down and press `Save Changes` button
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## Proof of Concept
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- Video
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> https://youtu.be/WtOiHY5R-t0
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- Image
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