PT-2021-21356 · Yoast · Yoast Seo

Published 2021-08-13 · Updated 2021-09-01 · CVE-2021-36788

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions yoast seo extension versions prior to 7.2.3 for TYPO3

Description The issue allows for XSS due to the extension's failure to properly encode user input for output in HTML context. A TYPO3 backend user account is required to exploit this issue.

Recommendations For versions prior to 7.2.3, update to version 7.2.3 or later to resolve the issue. As a temporary workaround, consider restricting access to the extension's functionality that handles user input to minimize the risk of exploitation.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-36788

GHSA-28W5-J8XJ-2XWC

Affected Products

Yoast Seo

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2021-36788 · Security Note
• https://osv.dev/vulnerability/CVE-2021-36788 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-28w5-j8xj-2xwc · Vendor Advisory
• https://typo3.org/security/advisory/typo3-ext-sa-2021-013 · Vendor Advisory
• https://typo3.org/help/security-advisories/security · Vendor Advisory
• https://github.com/Yoast/Yoast-SEO-for-TYPO3/commit/a8278dae97dce8cd0722d38f7f5a30b563668590 · Note
• https://github.com/Yoast/Yoast-SEO-for-TYPO3 · Note
• https://t.me/cibsecurity/27331 · Telegram Post
• https://typo3.org/security/advisory/typo3-ext-sa-2021-012 · Note