CVE-2021-24634

Recipe Card Blocks by WPZOOM <= 2.8.2 - Authenticated Stored Cross-Site Scripting

2021-08-24 00:00
apple502j

Strategic Overview

Status
Patched in 2.8.3
Affected Plugin
Recipe Card Blocks Lite
Affected Version
< 2.8.3
CVSS
5.4Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24634
View all Recipe Card Blocks Lite vulnerabilities

At a glance

CVE-2021-24634 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the Recipe Card Blocks Lite WordPress plugin, affecting versions < 2.8.3. It carries a CVSS score of 5.4 (reachable over the network; low attack complexity). Exploitation requires an authenticated account. The issue is fixed in version 2.8.3; sites on affected versions should update now. Disclosed August 2021, reported by apple502j.

Vulnerability Overview

The Recipe Card Blocks by WPZOOM plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.8.2 by not properly sanitizing or escaping some of the properties of the Recipe Card Block (such as ingredientsLayout, iconSet, steps, ingredients, recipeTitle, or settings). This makes it possible for contributor-level 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.

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

Reaching this weakness in Recipe Card Blocks Lite < 2.8.3 takes any authenticated account. 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 Recipe Card Blocks Lite the fix is 2.8.3: builds < 2.8.3 are affected, anything from 2.8.3 onward is not.

Remediation

Update to version 2.8.3, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to Recipe Card Blocks Lite: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Recipe Card Blocks Lite 2.8.3 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24634https://www.wordfence.com/threat-intel/vulnerabilities/id/6f6ece0e-7c7c-4c9b-b860-3b279e98c087https://nvd.nist.gov/vuln/detail/CVE-2021-24634

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C