Security readout for executives and security teams
Plain-English summary
CVE-2021-24667 is an authenticated stored cross-site scripting issue in the WordPress Simply Gallery Blocks with Lightbox plugin. A low-privileged user could store script content through insufficient validation of image metadata used by Lightbox. This can affect site visitors or administrators who view the affected content.
Executive priority
Treat this as a moderate website integrity and account-risk issue. It is not KEV-listed and has no cited active exploitation, but stored XSS in WordPress can expose administrators and visitors if vulnerable content is viewed.
Technical view
The source bundle describes CWE-79 stored XSS in Lightbox functionality for Simply Gallery Blocks with Lightbox, affecting version 2.2.0 and below, with the title indicating versions before 2.2.1. The flaw is tied to insufficient validation of image parameters in metadata. No CVSS score is provided.
Likely exposure
Exposure is most likely on WordPress sites using the Simply Gallery Blocks with Lightbox plugin, especially where non-admin users can create or edit gallery, image, or Lightbox metadata. The source bundle contains inconsistent version wording, so verify installed versions against vendor or WPScan guidance.
Exploitation context
The sources describe authenticated low-privilege stored XSS. The bundle does not provide evidence of public exploitation, and it is not listed as CISA KEV. Risk depends on whether untrusted or lower-privileged users can modify affected gallery metadata.
Researcher notes
Evidence is limited to the CVE description and referenced advisory entries. The source bundle has version ambiguity: the title says below 2.2.1, while the affected object lists 2.2.1. Validate exact fixed and affected ranges before closing exposure.
Mitigation direction
- Identify WordPress sites using the Simply Gallery Blocks with Lightbox plugin.
- Move installations off versions described as 2.2.0 and below or below 2.2.1.
- Check vendor or WPScan guidance for the current fixed version.
- Restrict gallery and media editing to trusted roles until remediated.
- Review existing gallery metadata for unexpected script-like content.
Validation and detection
- Inventory installed plugin versions across WordPress environments.
- Confirm whether lower-privileged users can edit gallery or Lightbox metadata.
- Review pages containing Simply Gallery Blocks Lightbox content for stored script indicators.
- Check security advisories from CVE, FortiGuard, and WPScan for version clarification.
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-2021-24667 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-21-060CVE reference · x_refsource_MISC
- https://wpscan.com/vulnerability/5925b263-6d6f-4a03-a98a-620150dff8f7CVE 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.