Is CVE-2021-47750 actively exploited?

CVE-2021-47750 has no public evidence of in-the-wild exploitation as of 2026-01-22.

What is the CVSS score for CVE-2021-47750?

CVE-2021-47750 has a CVSS score of 5.1 (MEDIUM severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2021-47750?

Patch guidance is available from youphptube security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-47750.

Which products are affected by CVE-2021-47750?

1 product: youphptube youphptube.

CVE-2021-47750 - remediation guidance & executive summary

Description

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.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: none
User Action: active
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-79 · Cross-site Scripting (XSS)

Metadata

Primary Vendor: YOUPHPTUBE
Published: 1/13/2026
Last Modified: 1/22/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-47750

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary