CVE-2021-47912Public exploitNetwork attack vector

Reflected XSS via unescaped admin parameters

Published Feb 1, 2026 · Updated Feb 1, 2026

Reflected XSS in PHP Sugar PHP Melody 3.0 allows remote authenticated users to execute script through crafted admin requests. The categories, video-import, and user-import pages place the moved, keyword, and username parameters into HTML without output encoding. Administrator or editor access is required, and injected script runs in the browser context handling the crafted response, exposing that session to client-side actions.

CVSS severity5.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in PHP Sugar PHP Melody 3.0 allows remote authenticated users to execute script through crafted admin requests. The categories, video-import, and user-import pages place the moved, keyword, and username parameters into HTML without output encoding. Administrator or editor access is required, and injected script runs in the browser context handling the crafted response, exposing that session to client-side actions.

The record

CVE
CVE-2021-47912
Published
Feb 1, 2026
Updated
Feb 1, 2026
Vendor
PHP Sugar
Product
PHP Melody
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

PHP Sugar · PHP Melodyversion=3.0

Published CVSS scores

5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.4VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
5.4NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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