AddToAny Share Buttons <= 1.7.45 - Authenticated Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.7.46
- Affected Plugin
- AddToAny Share Buttons
- Affected Version
< 1.7.46- CVSS
- 5.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-24568
At a glance
CVE-2021-24568 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the AddToAny Share Buttons WordPress plugin, affecting versions < 1.7.46. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 1.7.46; sites on affected versions should update now. Disclosed August 2021, reported by Asif Nawaz Minhas.
Vulnerability Overview
The AddToAny Share Buttons WordPress plugin before 1.7.46 does not sanitise its Sharing Header setting when outputting it in frontend pages, allowing high privilege users such as admin to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in AddToAny Share Buttons < 1.7.46 takes any authenticated account. Cross-site scripting happens when input from a request is written into a page without being escaped for the context it lands in, so the browser parses attacker-supplied text as markup or script.
Injected script runs with the privileges of whoever views the affected page, which is how these flaws turn into administrator session theft, silent account creation or persistent backdoors in page content. For AddToAny Share Buttons the fix is 1.7.46: builds < 1.7.46 are affected, anything from 1.7.46 onward is not.
Remediation
Update to version 1.7.46, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to AddToAny Share Buttons: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: AddToAny Share Buttons 1.7.46 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in AddToAny Share Buttons
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