Security readout for executives and security teams
Plain-English summary
This WordPress plugin flaw could let attacker-supplied script run in a logged-in administrator's browser. The source bundle does not show active exploitation, a CVSS score, or a named fixed version, so urgency should be based on whether the plugin is installed and used on administrative sites.
Executive priority
Treat this as a targeted WordPress admin risk, not a confirmed mass-exploitation event. Prioritize sites where the plugin is installed and administrators handle sensitive business operations, then remove, disable, or update according to vendor guidance.
Technical view
CVE-2021-24437 is a reflected XSS issue in Favicon by RealFaviconGenerator through version 1.3.20. One parameter is not sanitized or escaped before being returned in a response, allowing script execution in the context of a logged administrator. The weakness maps to CWE-79.
Likely exposure
Exposure is limited to WordPress sites running Favicon by RealFaviconGenerator version 1.3.20 or earlier. Risk is most relevant where administrators can be induced to interact with affected plugin functionality while logged in.
Exploitation context
The bundle does not cite active exploitation, KEV listing, public exploit use, or weaponized details. The described impact requires execution in a logged administrator context, which generally needs user interaction or an admin browsing path.
Researcher notes
Evidence is sparse: no CVSS, no KEV status, and no fixed version is named in the provided bundle. The core issue is reflected XSS from unsanitized or unescaped output, with execution scoped to logged administrator context.
Mitigation direction
- Inventory WordPress sites for Favicon by RealFaviconGenerator installations.
- Check vendor or WordPress plugin guidance for a fixed release or advisory.
- Disable or remove the plugin if it is unnecessary.
- Restrict WordPress administrator access to trusted users and devices.
- Review admin-session monitoring for suspicious browser-side activity.
Validation and detection
- Confirm installed plugin versions across managed WordPress sites.
- Flag any installation at version 1.3.20 or earlier.
- Check whether administrative users still access affected plugin pages.
- Review vendor guidance before performing security testing.
- Validate remediation in staging before production changes.
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-2021-24437 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://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9CVE 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.