CVE-2021-43692: youtube-php-mirroring (last update Jun 9, 2017) is affected by a Cross Site Scripting (XSS) vulnerability in f

Q: How do I fix CVE-2021-43692?

youtube-php-mirroring: upgrade to 2017-06-09. Exact commands for each OS are on this page.

Q: Is CVE-2021-43692 being exploited?

CVE-2021-43692 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-2021-43692 affect?

CVE-2021-43692 affects youtube-php-mirroring. Severity is medium (CVSS 6.1). youtube-php-mirroring (last update Jun 9, 2017) is affected by a Cross Site Scripting (XSS) vulnerability in file ytproxy/index.php.

Q: How urgent is CVE-2021-43692?

Priority 39/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2021-43692 is a medium-severity flaw (CVSS 6.1) affecting youtube-php-mirroring. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

youtube-php-mirroring (last update Jun 9, 2017) is affected by a Cross Site Scripting (XSS) vulnerability in file ytproxy/index.php.

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	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-79
Published	2021-11-29
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: youtube-php-mirroring project

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

Am I affected?

Timeline

2021-11-29 15:15 UTCPublished CVE record published
2026-06-17 04:11 UTCUpdated Record last modified

youtube-php-mirroring project youtube-php-mirroring UPGRADE

Affected: < 2017-06-09

Fixed in: 2017-06-09

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy youtube-php-mirroring || rpm -q youtube-php-mirroring || youtube-php-mirroring --version

2. UPGRADE to 2017-06-09 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade youtube-php-mirroring

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade youtube-php-mirroring

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-2021-43692?

youtube-php-mirroring: upgrade to 2017-06-09. Exact commands for each OS are on this page.

Is CVE-2021-43692 being exploited?

CVE-2021-43692 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-2021-43692 affect?

CVE-2021-43692 affects youtube-php-mirroring. Severity is medium (CVSS 6.1). youtube-php-mirroring (last update Jun 9, 2017) is affected by a Cross Site Scripting (XSS) vulnerability in file ytproxy/index.php.

How urgent is CVE-2021-43692?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

References

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