Impact
The Embeds For YouTube Plugin Support plugin contains an improper neutralization of input during web page generation that allows attacker‑controlled scripts to be stored and executed in the context of site visitors. The stored XSS flaw can lead to session hijacking, defacement, or the execution of arbitrary client‑side code with the privileges of the rendering user. This weakness is classified as CWE‑79.
Affected Systems
The vulnerability affects the WordPress YouTube Embed plugin (Embeds For YouTube Plugin Support: YouTube Embed) for all releases through version 5.4. Users running any version up to 5.4 on a WordPress site are susceptible. No further version details are provided.
Risk and Exploitability
The CVSS score of 6.5 indicates a medium severity, while the EPSS score of <1% shows a very low probability of exploitation in the wild so far. The flaw has not been listed in the CISA KEV catalog. The likely attack vector is a logged‑in administrator or any user with the ability to save embed content, who can submit malicious code that is stored in the database. Once a victim loads a page containing the stored content, the injected JavaScript runs in the victim’s browser without additional authentication or privilege escalation.
OpenCVE Enrichment