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  4. CVE 2026 96566 newsletter 940 unauthenticated stored cross site
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Back to active CVEs
High · CVSS 7.2CVE-2026-96566

Newsletter <= 9.4.0 - Unauthenticated Stored Cross-Site Scripting via 'np1' Custom Field Parameter

Answer in brief

CVE-2026-96566 records a High severity (CVSS 7.2) vulnerability in Newsletter <= 9.4.0 - Unauthenticated Stored Cross-Site Scripting via 'np1' Custom Field Parameter. The current sources do not mark it as known exploited. The current feed maps satollo/Newsletter – Send awesome emails from WordPress (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 Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.2
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 7.2. 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 satollo/Newsletter – Send awesome emails from WordPress (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
satollo/Newsletter – Send awesome emails from WordPressgeneric>=0 <=9.4.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for satollo/Newsletter – Send awesome emails from WordPress.
  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

    Oct 2, 2026

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

  2. Source modified

    Oct 2, 2026

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

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referenceplugins.trac.wordpress.org
  • Source referencewordfence.com
Upstream source description

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'np1' Custom Field Parameter in all versions up to, and including, 9.4.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The subscription endpoint (na=sa) requires no nonce, no capability check, and no CAPTCHA, and the payload can be smuggled past email-address validation by embedding the {profile_1} placeholder in the local part of the submitted address, since WordPress's is_email() permits curly braces there.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Kubio AI Page Builder <= 2.9.2 - Unauthenticated Stored Cross-Site Scripting via SVG Comment Content (KSES Allowlist Bypass)Also CWE-79
  • Download Monitor <= 5.2.10 - Unauthenticated Stored Cross-Site Scripting via Cross-Origin postMessage to Admin EditorAlso CWE-79
  • CMB2 <= 2.13.1 - Unauthenticated Stored Cross-Site Scripting via 'textarea_code' FieldAlso CWE-79
  • Relevanssi Premium <= 2.31.4 - Unauthenticated Stored Cross-Site Scripting via '_rt' ParameterAlso CWE-79
  • Multiple vulnerabilities in the Repasat applicationAlso CWE-79
  • Multiple vulnerabilities in the Repasat applicationAlso CWE-79

Record context

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