CVE-2026-81900 Concrete CMS before 9.5.3 is vulnerable to Stored XSS in the YouTube block (vWidth/vHeight)

Concrete CMS before 9.5.3 applied only trim to the YouTube block's stored width and height values and printed them into iframe HTML attributes without escaping or integer casting, resulting in stored cross-site scripting. A user with editblock permission could inject an event handler that execute...

CVE-2026-81900: Improper Neutralization of Input During Web Page Generation

Concrete CMS before 9.5.3 applied only trim to the YouTube block's stored width and height values and printed them into iframe HTML attributes without escaping or integer casting, resulting in stored cross-site scripting. A user with editblock permission could inject an event handler that execute...

CVE-2024-38354

CVE-2024-38354 affects CodiMD/HackMD.io notes, where the notebook feature allows rendering of iframe HTML tags with an improperly sanitized name attribute, enabling DOM clobbering-based XSS. The issue, fixed in version 2.5.4, impacts note collaboration environments that render untrusted HTML. No ...

CVE-2007-1736: Undefined Security Weakness

Mozilla Firefox 2.0.0.3 does not check URLs embedded in 1 object or 2 iframe HTML tags against the phishing site blacklist, which allows remote attackers to bypass phishing protection...