Answer in brief
CVE-2026-66640 records a Unknown severity vulnerability in WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability. The current sources do not mark it as known exploited. The current feed maps Marcus (aka @msykes)/Login With Ajax (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Marcus (aka @msykes)/Login With Ajax (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Marcus (aka @msykes)/Login With Ajaxgeneric | n/a | Not reported |
Published upstream
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 18, 2026
Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-66640 records a Unknown severity vulnerability in WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability. The current sources do not mark it as known exploited. The current feed maps Marcus (aka @msykes)/Login With Ajax (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Marcus (aka @msykes)/Login With Ajax (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Marcus (aka @msykes)/Login With Ajaxgeneric | n/a | Not reported |
Published upstream
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 18, 2026
Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.
Quoted source text, attributed separately from HOL analysis.