What is the CVSS score of CVE-2021-47913?

CVE-2021-47913 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Php Melody are affected by CVE-2021-47913?

Organizations using PHP Melody 3.0 should be aware of moderate risk from CVE-2021-47913, a cross-site scripting vulnerability rated CVSS 6.4.

Is there a public PoC exploit available for CVE-2021-47913?

Yes, a public proof-of-concept exploit is available for CVE-2021-47913. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2021-47913?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Php Melody CVE-2021-47913

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-01 disclosure@vulncheck.com

XSS Php Melody

6.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.4 MEDIUM

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:01 vuln.today

PoC Detected

Feb 11, 2026 - 19:29 vuln.today

Public exploit code

CVE Published

Feb 01, 2026 - 13:15 nvd

MEDIUM 6.4

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Php Melody. 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.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

CVE-2021-47913 vulnerability details – vuln.today

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