Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
The W3 Total Cache plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Comment Content via Output-Buffer Regex Rewrite in all versions up to, and including, 2.10.6 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This vulnerability is only exploitable when the 'Remove query strings from static resources' option is enabled in W3 Total Cache, as mutate_url() must strip the '?' delimiter and everything following it — including the closing quote of the outer attribute — to break the attribute boundary.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
STABLE
W3 Total CacheのXSS（CVE-2026-87920）。クエリ文字列を削る処理がコメント本文にも掛かり、仕込んだスクリプトが閲覧者のブラウザで動く。 対象：2.10.6以下で「静的リソースからクエリ文字列を削除する」がオン 対処方法：2.10.7にあげるか、オフにする 全員が対象ではないけど、更新するだけだから、早めがおとくだミー🐾 https://patchon.jp/blog/w3-total-cache-comment-stored-xss
🚨 W3 Total Cache に脆弱性（深刻度 高） 90万サイト以上が利用 / CVSS 7.2 修正版 2.10.7 が公開済み https://shindan.m-g-n.me/alerts/cve-2026-87920/