Security readout for executives and security teams
Plain-English summary
CVE-2021-24665 affects the WP Video Lightbox WordPress plugin before 1.9.3. A lower-privileged site user, such as a contributor, could store script through shortcode attributes. This can turn normal page or post viewing into browser-side compromise for visitors or administrators.
Executive priority
Treat this as a moderate WordPress content-integrity risk. Prioritize internet-facing sites, sites with many content contributors, and sites where administrator sessions are commonly active while reviewing user-submitted posts.
Technical view
The issue is stored cross-site scripting caused by shortcode attributes not being escaped in WP Video Lightbox before 1.9.3. The reported permission threshold is Contributor or higher. The source bundle maps this to CWE-79, but provides no CVSS score or detailed exploit prerequisites beyond the role requirement.
Likely exposure
Exposure is most likely on WordPress sites running WP Video Lightbox versions earlier than 1.9.3, especially where contributor-level users can create or edit content containing plugin shortcodes.
Exploitation context
The sources do not show CISA KEV listing or confirmed active exploitation. The practical risk is authenticated stored XSS: a contributor-level user can persist malicious browser-side behavior that later executes when others view affected content.
Researcher notes
The public data is concise: affected version boundary, role threshold, CWE-79, and references are available, but CVSS, exploit telemetry, and detailed patch notes are not included in the provided bundle. Avoid assuming unauthenticated exposure.
Mitigation direction
- Update WP Video Lightbox to version 1.9.3 or later.
- Review vendor and plugin repository guidance for any newer fixed version.
- Restrict contributor and author access to trusted users only.
- Review existing content using WP Video Lightbox shortcodes.
- Remove suspicious shortcode attributes from posts and pages.
Validation and detection
- Inventory WordPress sites for the WP Video Lightbox plugin.
- Confirm installed plugin versions are 1.9.3 or later.
- Identify users with Contributor, Author, Editor, or Administrator roles.
- Review posts and pages containing WP Video Lightbox shortcodes.
- Check security logs for unexpected content edits by lower-privileged users.
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-2021-24665 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.fortiguard.com/zeroday/FG-VD-21-059CVE reference · x_refsource_MISC
- https://wpscan.com/vulnerability/42a8947f-2ae5-4f12-bd3d-ab3716501df5CVE reference · x_refsource_MISC
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.