Is CVE-2021-47749 actively exploited?

CVE-2021-47749 has no public evidence of in-the-wild exploitation as of 2026-01-14.

What is the CVSS score for CVE-2021-47749?

CVE-2021-47749 has a CVSS score of 8.7 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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-2021-47749?

Vendor patch guidance is linked from the references on this page. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-47749.

Which products are affected by CVE-2021-47749?

Affected products for CVE-2021-47749 are listed on this page once vendor data becomes available.

Fix CVE-2021-47749 - HIGH Vulnerability

Description

YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to access arbitrary files by manipulating the 'lang' parameter in GET requests. Attackers can exploit the path traversal flaw in locale/function.php to include and view PHP files outside the intended directory by using directory traversal sequences.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/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: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-22 · Path Traversal

Metadata

Primary Vendor: UNKNOWN
Published: 1/13/2026
Last Modified: 1/14/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-47749

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary