Security readout for executives and security teams
Plain-English summary
PHP Melody 3.0 has a stored cross-site scripting issue in a video editing parameter. A logged-in remote attacker could save malicious JavaScript that later runs in users’ browsers, risking session theft, phishing, or unauthorized interface actions. This is not listed in CISA KEV, and the sources do not show active exploitation.
Executive priority
Treat as a moderate web application risk. Prioritize remediation for internet-facing or multi-user PHP Melody 3.0 sites because stored XSS can affect administrators and users over time, even without evidence of active exploitation.
Technical view
CVE-2021-47914 is CWE-79 persistent XSS in PHP Melody 3.0, specifically the edit-video.php submitted parameter. CVSS 3.1 is 6.4: network exploitable, low complexity, low privileges required, no user interaction, changed scope, low confidentiality and integrity impact, no availability impact.
Likely exposure
Exposure is limited to PHPSUGAR PHP Melody version 3.0 installations, especially where authenticated users can access video submission or editing functions. The provided data marks other versions as not affected by default, but organizations should confirm exact deployed versions against vendor guidance.
Exploitation context
The issue requires low privileges and is remotely reachable, making misuse plausible in multi-user PHP Melody environments. Public advisories exist, including one tagged as exploit, but the provided sources do not establish active exploitation or CISA KEV inclusion.
Researcher notes
Do not assume broader product impact beyond PHP Melody 3.0 from the provided sources. The available record names the submitted parameter in edit-video.php and provides CVSS details, but remediation specifics should be taken from PHPSUGAR’s published fix notice.
Mitigation direction
- Identify any PHP Melody 3.0 deployments.
- Review PHPSUGAR’s vulnerability report and fix guidance.
- Apply the vendor-provided fix or upgrade path if applicable.
- Restrict video editing access to trusted users until remediated.
- Monitor for unusual stored content or unexpected script behavior.
Validation and detection
- Confirm deployed PHP Melody version and build.
- Check whether edit-video.php functionality is accessible to low-privileged users.
- Review application content fields for unexpected scripts.
- Verify vendor fix or upgrade has been applied.
- Re-test the affected workflow after remediation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-47914 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N3.12.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.4MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- Vulnerability Lab AdvisoryCVE reference · exploit
- Vulnerability Lab AdvisoryCVE reference · patch
- Product HomepageCVE reference · product
- VulnCheck Advisory: PHP Melody 3.0 Persistent XSS Vulnerability via Edit Video ParameterCVE reference · third-party-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.