CVE-2021-47749: YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to acces

Q: How do I fix CVE-2021-47749?

youphptube: upgrade to newer than 7.8. Exact commands for each OS are on this page.

Q: Is CVE-2021-47749 being exploited?

CVE-2021-47749 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-47749 affect?

CVE-2021-47749 affects youphptube. Severity is medium (CVSS 5.5). 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/fu

Q: How urgent is CVE-2021-47749?

Priority 44/100. Public exploit reference

This month

MEDIUM 5.5UPGRADE

CVE-2021-47749 is a medium-severity flaw (CVSS 5.5) affecting youphptube. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.8% (top 21%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-01-13
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: youphptube

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-13 23:15 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

youphptube youphptube UPGRADE

Affected: <= 7.8

Fixed in: newer than 7.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy youphptube || rpm -q youphptube || youphptube --version

2. UPGRADE to newer than 7.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade youphptube

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade youphptube

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-47749?

youphptube: upgrade to newer than 7.8. Exact commands for each OS are on this page.

Is CVE-2021-47749 being exploited?

CVE-2021-47749 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-47749 affect?

CVE-2021-47749 affects youphptube. Severity is medium (CVSS 5.5). 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/fu

How urgent is CVE-2021-47749?

Priority 44/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-47750 MEDIUM 6.1 UPGRADE YouPHPTube <= 7.8 contains a cross-site scripting vulnerability that allows attackers to inject malicious scri

References

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