CVE-2021-24991

WooCommerce PDF Invoices & Packing Slips <= 2.10.4 - Reflected Cross-Site Scripting via tab and section parameter

2021-12-06 00:00
Krzysztof Zając

Strategic Overview

Status
Patched in 2.10.5
Affected Plugin
PDF Invoices & Packing Slips for WooCommerce
Affected Version
< 2.10.5
CVSS
4.8Medium
Weakness type
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE
CVE-2021-24991
View all PDF Invoices & Packing Slips for WooCommerce vulnerabilities

At a glance

CVE-2021-24991 is a medium-severity Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in the PDF Invoices & Packing Slips for WooCommerce WordPress plugin, affecting versions < 2.10.5. It carries a CVSS score of 4.8 (reachable over the network; low attack complexity). The issue is fixed in version 2.10.5; sites on affected versions should update now. Disclosed December 2021, reported by Krzysztof Zając.

Vulnerability Overview

The WooCommerce PDF Invoices & Packing Slips WordPress plugin before 2.10.5 does not escape the tab and section parameters before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting in the admin dashboard

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 PDF Invoices & Packing Slips for WooCommerce < 2.10.5 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 PDF Invoices & Packing Slips for WooCommerce the fix is 2.10.5: builds < 2.10.5 are affected, anything from 2.10.5 onward is not.

Remediation

Update to version 2.10.5, or a newer patched version

How does WordSec protect against this?

The attempt arrives as an ordinary request to PDF Invoices & Packing Slips for WooCommerce: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: PDF Invoices & Packing Slips for WooCommerce 2.10.5 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2021-24991https://www.wordfence.com/threat-intel/vulnerabilities/id/6d7f9291-5a57-4aca-b18f-623bf07348a4https://nvd.nist.gov/vuln/detail/CVE-2021-24991

Related records

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