CVE-2021-20845

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-24 · updated 2026-06-17
Weakness: CWE-352

Description

Cross-site request forgery (CSRF) vulnerability in Unlimited Sitemap Generator versions prior to v8.2 allows a remote attacker to hijack the authentication of an administrator and conduct arbitrary operation via a specially crafted web page.

Affected products

XML-Sitemaps Unlimited Sitemap Generator: before 8.2 — fixed in 8.2

How to fix

Upgrade to a fixed version: XML-Sitemaps Unlimited Sitemap Generator 8.2. Check the vendor advisory for mitigations.

References

https://jvn.jp/en/jp/JVN58407606/index.html
https://www.xml-sitemaps.com/news-20210831.html
https://www.xml-sitemaps.com/standalone-google-sitemap-generator.html
https://jvn.jp/en/jp/JVN58407606/index.html
https://www.xml-sitemaps.com/news-20210831.html
https://www.xml-sitemaps.com/standalone-google-sitemap-generator.html

Get alerted when CVE-2021-20845 or the next vulnerability affects your stack