Poll, Survey & Quiz Maker Plugin by Opinion Stage <= 19.6.24 - Unauthenticated Stored Cross-Site Scripting

2019-09-16 00:00
Anonymous

Strategic Overview

Status
Patched in 19.6.25
Affected Plugin
Quiz Maker, Poll Maker & Survey Maker by Opinion Stage
Affected Version
<= 19.6.24
CVSS
6.1Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE pending
View all Quiz Maker, Poll Maker & Survey Maker by Opinion Stage vulnerabilities

At a glance

This record tracks a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Quiz Maker, Poll Maker & Survey Maker by Opinion Stage WordPress plugin, affecting versions <= 19.6.24. 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 19.6.25; sites on affected versions should update now. Disclosed September 2019.

Vulnerability Overview

The Poll, Survey & Quiz Maker Plugin by Opinion Stage plugin for WordPress is vulnerable to Stored Cross-Site Scripting via several parameters in versions up to, and including, 19.6.24 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated 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 privileges on the target site.

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Reaching this weakness in Quiz Maker, Poll Maker & Survey Maker by Opinion Stage <= 19.6.24 takes no account at all. 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 Quiz Maker, Poll Maker & Survey Maker by Opinion Stage the fix is 19.6.25: builds <= 19.6.24 are affected, anything from 19.6.25 onward is not.

Remediation

Update to version 19.6.25, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Quiz Maker, Poll Maker & Survey Maker by Opinion Stage 19.6.25 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Login Security
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/e0f19403-af02-4a29-b4f3-778da4c2df17

Related records

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