PowerPress <= 10.2.3 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'Feed[title]'

2023-06-06 00:00
Anonymous

Strategic Overview

Status
Patched in 10.2.4
Affected Plugin
PowerPress Podcasting plugin by Blubrry
Affected Version
<= 10.2.3
CVSS
4.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE pending
View all PowerPress Podcasting plugin by Blubrry vulnerabilities

At a glance

This record tracks a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the PowerPress Podcasting plugin by Blubrry WordPress plugin, affecting versions <= 10.2.3. It carries a CVSS score of 4.4 (reachable over the network). Exploitation requires an authenticated account at Administrator level or above. The issue is fixed in version 10.2.4; sites on affected versions should update now. Disclosed June 2023.

Vulnerability Overview

The PowerPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘Feed[title]’ parameter in versions up to, and including, 10.2.3 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, 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, and no interaction from a victim user.

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

PowerPress Podcasting plugin by Blubrry <= 10.2.3 carries this weakness at Feed[title], and reaching it takes an account at Administrator level or above. 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 PowerPress Podcasting plugin by Blubrry the fix is 10.2.4: builds <= 10.2.3 are affected, anything from 10.2.4 onward is not.

Remediation

Update to version 10.2.4, or a newer patched version

How does WordSec protect against this?

An attacker needs Administrator access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: PowerPress Podcasting plugin by Blubrry 10.2.4 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.wordfence.com/threat-intel/vulnerabilities/id/64371d43-3acd-4863-80e4-deab071777b9

Related records

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