Strategic Overview
- Status
- Patched in 3.0.9
- Affected Plugin
- Easy Social Icons
- Affected Version
<= 3.0.8- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2021-39322
At a glance
CVE-2021-39322 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Easy Social Icons WordPress plugin, affecting versions <= 3.0.8. It carries a CVSS score of 6.1 (reachable over the network; low attack complexity). Exploitation requires no authentication. The issue is fixed in version 3.0.9; sites on affected versions should update now. Disclosed September 2021, reported by Ram.
Vulnerability Overview
The Easy Social Icons plugin <= 3.0.8 for WordPress echoes out the raw value of `$_SERVER['PHP_SELF']` in its main file. On certain configurations including Apache+modPHP this makes it possible to use it to perform a reflected Cross-Site Scripting attack by injecting malicious code in the request path.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Easy Social Icons <= 3.0.8 carries this weakness at PHP_SELF, and reaching it takes a caller who can reach the endpoint. 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 Easy Social Icons the fix is 3.0.9: builds <= 3.0.8 are affected, anything from 3.0.9 onward is not.
Remediation
Update to version 3.0.9, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Easy Social Icons: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Easy Social Icons 3.0.9 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Easy Social Icons
- 8.8CVE-2015-2084: Easy Social Icons CSRF to Stored Cross-Site Scripting
CVE-2015-2084 - 7.3Easy Social Icons <= 3.2.0 XSS and Missing Authorization Checks
- 7.2Easy Social Icons <= 1.2.3.1 SQL Injection
- 5.5Easy Social Icons <= 3.2.2 Admin+ Cross-Site Scripting
- 5.5CVE-2022-0840: Easy Social Icons <= 3.2.0 Admin+ Stored XSS
CVE-2022-0840 - 5.5CVE-2022-0887: Easy Social Icons <= 3.1.3 Admin+ SQL Injection
CVE-2022-0887 - 4.3CVE-2023-33998: Easy Social Icons <= 3.2.4 Missing Authorization
CVE-2023-33998
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