CVE-2021-47913: PHP Melody 3.0 contains a persistent cross-site scripting vulnerability in the video editor that allows privil

Routine

MEDIUM 6.4DOWNGRADE

CVE-2021-47913 is a medium-severity flaw (CVSS 6.4) affecting php melody. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PHP Melody 3.0 contains a persistent cross-site scripting vulnerability in the video editor that allows privileged users to inject malicious scripts. Attackers can exploit the WYSIWYG editor to execute persistent scripts, potentially leading to session hijacking and application manipulation.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-01
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: phpsugar

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

Am I affected?

Timeline

2026-02-01 13:15 UTCPublished CVE record published
2026-06-17 04:18 UTCUpdated Record last modified

phpsugar php melody DOWNGRADE

Affected: 3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.0

1. Check installed version

apt-cache policy php-melody || rpm -q php-melody || php-melody --version

2. No fixed release: DOWNGRADE to a release before 3.0 (Debian / Ubuntu)

apt-cache madison php-melody sudo apt install php-melody=<VERSION_BEFORE_3.0> sudo apt-mark hold php-melody

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list php-melody sudo dnf downgrade php-melody-<VERSION_BEFORE_3.0> sudo dnf versionlock add php-melody

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2021-47913?

php melody: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-47913 being exploited?

CVE-2021-47913 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-2021-47913 affect?

CVE-2021-47913 affects php melody. Severity is medium (CVSS 6.4). PHP Melody 3.0 contains a persistent cross-site scripting vulnerability in the video editor that allows privileged users to inject malicious scripts. Attackers can exploit the WYSIWYG editor to execute persistent scripts, potentially leadin

How urgent is CVE-2021-47913?

Priority 32/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2021-47915 HIGH 8.1 DOWNGRADE PHP Melody version 3.0 contains a remote SQL injection vulnerability in the video edit module that allows auth
CVE-2021-47914 MEDIUM 6.4 DOWNGRADE PHP Melody version 3.0 contains a persistent cross-site scripting vulnerability in the edit-video.php submitte
CVE-2021-47912 MEDIUM 6.4 DOWNGRADE PHP Melody version 3.0 contains multiple non-persistent cross-site scripting vulnerabilities in categories, im

References

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