XSS in Youphptube
CVE-2021-47750
YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. Attackers can craft special signup URLs with embedded script tags to execute arbitrary JavaScript in victims' browsers when they access the signup page.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 26.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- Youphptube — versions 0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/51101 (Exploit, VDB Entry, Third Party Advisory, exploit)
- web.archive.org/web/20170506141644/https://www.youphptube.com/ (product, Not Applicable)
- www.vulncheck.com/advisories/youphptube-cross-site-scripting (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2021-47750?
- CVE-2021-47750 is a medium-severity vulnerability in Youphptube, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-13.
- How severe is CVE-2021-47750?
- Medium severity. CVSS v3 base score is 6.1 out of 10.