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

CVE-2021-47750 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Youphptube are affected by CVE-2021-47750?

CVE-2021-47750 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

Is there a public PoC exploit available for CVE-2021-47750?

Yes, a public proof-of-concept exploit is available for CVE-2021-47750. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47750?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Youphptube CVE-2021-47750

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-13 disclosure@vulncheck.com

XSS Youphptube

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Jan 22, 2026 - 20:27 vuln.today

Public exploit code

CVE Published

Jan 13, 2026 - 23:15 nvd

MEDIUM 6.1

DescriptionCVE.org

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.

AnalysisAI

YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts through the redirectUri parameter in the signup page. [CVSS 6.1 MEDIUM]

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the redirectUri component of Youphptube. 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.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2021-47750 vulnerability details – vuln.today

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