Elegant Themes (Various Versions) - Stored Cross-Site Scripting
Strategic Overview
- Status
- Patched in 3.17.3
- Affected Theme
- Divi
- Affected Version
<= 3.17.2- CVSS
- 6.4Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE pending
At a glance
This record tracks a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Divi WordPress theme, affecting versions <= 3.17.2. It carries a CVSS score of 6.4 (reachable over the network; low attack complexity). The issue is fixed in version 3.17.3; sites on affected versions should update now. Disclosed October 2018.
Vulnerability Overview
The Elegant Themes Divi Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.17.2 in addition to the following themes: Divi <= 3.17.2 and Extra <= 2.17.2 due to insufficient input sanitization and output escaping in the post builder. This makes it possible for authenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
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 interaction from a victim user.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Reaching this weakness in Divi <= 3.17.2 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 Divi the fix is 3.17.3: builds <= 3.17.2 are affected, anything from 3.17.3 onward is not.
Remediation
Update to version 3.17.3, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to Divi: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Divi 3.17.3 closes this, and updating the theme is the step that ends it.
- Firewall
- Alerts
External References
Related records
Same weakness class
Other vulnerabilities in Divi
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