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  4. CVE 2026 66640 wordpress login with ajax plugin 451 cross site
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-66640

WordPress Login With Ajax plugin <= 4.5.1 - Cross Site Scripting (XSS) vulnerability

Answer in brief

CVE-2026-66640 records a Medium severity (CVSS 6.5) 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.

Published Aug 18, 2026Updated Aug 20, 2026Source checked Oct 2, 2026First seen by HOL Aug 18, 2026Material review Aug 20, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.5. 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.

Affected scope and exposure questions

The current feed maps Marcus (aka @msykes)/Login With Ajax (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Marcus (aka @msykes)/Login With Ajaxgenericn/aNot reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Marcus (aka @msykes)/Login With Ajax.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Aug 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Aug 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 18, 2026

Sources and claim methodology

  • Source referencepatchstack.com
Upstream source description

Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • LimeSurvey Community Edition 7.4.0 - Stored XSS through the Date/Time date_min question attributeAlso CWE-79
  • CodeArt Google MP3 Audio Player 1.0.11 Arbitrary File Read via direct_download.phpSame generic ecosystem
  • Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFileSame generic ecosystem
  • H3C CVM Unauthenticated File Upload via fileUpload/upload TokenSame generic ecosystem
  • Apache Traffic Server: SNI to Host header matching policy is not properly enforcedSame generic ecosystem
  • @orpc/json-schema: Prototype injection in smart coercionSame generic ecosystem

Record context

Vulnerability class
XSS
EPSS
Not reported
CWE IDs
CWE-79
Source
CVE List V5
Source checked
Oct 2, 2026
References
1 linked source
Open source record