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

Q: How do I fix CVE-2021-47750?

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

Q: Is CVE-2021-47750 being exploited?

CVE-2021-47750 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-2021-47750 affect?

CVE-2021-47750 affects youphptube. Severity is medium (CVSS 6.1). 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 exe

Q: How urgent is CVE-2021-47750?

Priority 34/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2021-47750 is a medium-severity flaw (CVSS 6.1) 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 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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 70%)
CISA exploited list	No
Weakness	CWE-79
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-2021-47750?

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

Is CVE-2021-47750 being exploited?

CVE-2021-47750 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-2021-47750 affect?

CVE-2021-47750 affects youphptube. Severity is medium (CVSS 6.1). 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 exe

How urgent is CVE-2021-47750?

Priority 34/100. Public exploit reference

Related CVEs

CVE-2021-47749 MEDIUM 5.5 UPGRADE YouPHPTube <= 7.8 contains a local file inclusion vulnerability that allows unauthenticated attackers to acces

References

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