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Cross-site Scripting occurrences in Image Hover Effects Ultimate
The Image Hover Effects Ultimate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several values that can be added to an Image Hover in versions 9.8.1 to 9.8.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, the plugin only allows administrators access to edit Image Hovers, however, if a site admin makes the plugin's features available to lower privileged users through the 'Who Can Edit?' setting then this can be exploited by those users. (2022-12-13, CVE-2022-4207)
The Image Hover Effects Ultimate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Title & Description values that can be added to an Image Hover in versions up to, and including, 9.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, the plugin only allows administrators access to edit Image Hovers, however, if a site admin makes the plugin's features available to lower privileged users through the 'Who Can Edit?' setting then this can be exploited by those users. (2022-09-23, CVE-2022-2937)
The Image Hover Effects Ultimate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Media Image URL value that can be added to an Image Hover in versions up to, and including, 9.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, the plugin only allows administrators access to edit Image Hovers, however, if a site admin makes the plugin's features available to lower privileged users through the 'Who Can Edit?' setting then this can be exploited by those users. (2022-09-06, CVE-2022-2935)
The Image Hover Effects Ultimate plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Video Link values that can be added to an Image Hover in versions up to, and including, 9.7.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. By default, the plugin only allows administrators access to edit Image Hovers, however, if a site admin makes the plugin's features available to lower privileged users through the 'Who Can Edit?' setting then this can be exploited by those users. (2022-09-06, CVE-2022-2936)
Authenticated (admin or higher user role) Reflected Cross-Site Scripting (XSS) vulnerability in Biplob Adhikari's Image Hover Effects Ultimate plugin <= 9.7.1 at WordPress. (2022-05-20, CVE-2022-29424)
The Image Hover Effects Ultimate (Image Gallery, Effects, Lightbox, Comparison or Magnifier) WordPress plugin before 9.7.1 does not escape the effects parameter before outputting it back in an attribute in an admin page, leading to a Reflected Cross-Site Scripting (2022-01-24, CVE-2021-25031)
Why Cross-site Scripting can be dangerous
Cross site scripting is an attack where a web page executes code that is injected by an adversary. It usually appears, when users input is presented. This attack can be used to impersonate a user, take over control of the session, or even steal API keys.
The attack can be executed e.g. when you application injects the request parameter directly into the HTML code of the page returned to the user:
https://server.com/confirmation?message=Transaction+Complete
what results in:
<span>Confirmation: Transaction Complete</span>
In that case the message can be modified to become a valid Javascript code, e.g.:
https://server.com/confirmation?message=<script>dangerous javascript code here</script>
and it will be executed locally by the user's browser with full access to the user's personal application/browser data:
<span>Confirmation: <script>dangerous javascript code here</script></span>