HOMEVULNERABILITIESCVE-2021-47749
MEDIUM

CVE-2021-47749

CWE-22Published: January 13, 2026· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-47749 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

youphptube1 product(s)
youphptube
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.exploit-db.com/exploits/51101
ADVISORYhttps://www.vulncheck.com/advisories/youphptube-directory-traversal
ADVISORYhttps://www.exploit-db.com/exploits/51101

All References (4)

→
https://web.archive.org/web/20170506141644/https://www.youphptube.com/Not Applicable
→
https://www.exploit-db.com/exploits/51101Exploit · Third Party Advisory · VDB Entry
→
https://www.vulncheck.com/advisories/youphptube-directory-traversalThird Party Advisory
→
https://www.exploit-db.com/exploits/51101Exploit · Third Party Advisory · VDB Entry

Quick Facts

CVE IDCVE-2021-47749
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-22
CISA KEVNo
Affected1 vendor(s)
PublishedJan 13, 2026

Related CVEs (CWE-22)

CVE-2026-39861
10.0
CVE-2026-48282
KEV10.0
CVE-2008-3150
10.0
CVE-2025-9118
10.0
CVE-2025-54261
10.0
CVE-2026-34909
KEV10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-47749 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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