BestWebSoft's Pinterest <= 1.0.4 - Reflected Cross-Site Scripting
Strategic Overview
- Status
- Patched in 1.0.5
- Affected Plugin
- BestWebSoft’s Pinterest
- Affected Version
<= 1.0.4- CVSS
- 6.1Medium
- Weakness type
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- CVE
CVE-2017-18517
At a glance
CVE-2017-18517 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the BestWebSoft’s Pinterest WordPress plugin, affecting versions <= 1.0.4. 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 1.0.5; sites on affected versions should update now. Disclosed April 2017, reported by Neven Birusk.
Vulnerability Overview
The BestWebSoft's Pinterest plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 1.0.4 due to insufficient input sanitization and output escaping on the 'category' parameter. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a victim's browser granted they can trick a victim into performing an action, such as clicking on a link.
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')
BestWebSoft’s Pinterest <= 1.0.4 carries this weakness at category, 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 BestWebSoft’s Pinterest the fix is 1.0.5: builds <= 1.0.4 are affected, anything from 1.0.5 onward is not.
Remediation
Update to version 1.0.5, or a newer patched version
How does WordSec protect against this?
The attempt arrives as an ordinary request to BestWebSoft’s Pinterest: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: BestWebSoft’s Pinterest 1.0.5 closes this, and updating the plugin is the step that ends it.
- Firewall
- Alerts
External References
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