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  4. CVE 2026 78003 mailgun for wordpress 220 unauthenticated server
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Back to active CVEs
Critical · CVSS 9.8CVE-2026-78003

Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array KeysCVE-2026-78003

Answer in brief

CVE-2026-78003 records a Critical severity (CVSS 9.8) vulnerability in Mailgun for WordPress <= 2.2.0 - Unauthenticated Server-Side Request Forgery (SSRF) via 'addresses' Array Keys. The current sources do not mark it as known exploited. The current feed maps mailgun/Mailgun for WordPress (generic), mailgun/Mailgun for 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 Aug 22, 2026Updated Aug 25, 2026Source checked Oct 6, 2026First seen by HOL Aug 22, 2026Material review Aug 25, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.8. 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 mailgun/Mailgun for WordPress (generic), mailgun/Mailgun for WordPress (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
mailgun/Mailgun for WordPressgeneric0Not reported
mailgun/Mailgun for WordPressgeneric>=0 <=2.2.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for mailgun/Mailgun for WordPress, mailgun/Mailgun for 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

    Aug 22, 2026

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

  2. Source modified

    Aug 25, 2026

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

  3. First seen by HOL

    Aug 22, 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 Mailgun for WordPress plugin for WordPress is vulnerable to Server-Side Request Forgery (SSRF) via path traversal in versions up to and including 2.2.0. This is due to insufficient input validation in the add_list() function, which accepts user-controlled array keys from $_POST['addresses'], passes them through sanitize_text_field(). This makes it possible for unauthenticated attackers to make authenticated POST requests to any Mailgun API endpoint using the WordPress site's API key, including creating inbound email-forwarding routes that can intercept password reset emails, leading to administrator account takeover.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • SPIP Crayons Plugin < 3.5.0 Authorization Bypass RCESame generic ecosystem
  • Payload: Order confirmation validation issue in Payload EcommerceSame generic ecosystem
  • Payload: Field access control bypass on auth collectionsSame generic ecosystem
  • Payload relationship-query authorization bypassSame generic ecosystem
  • Payload: Token refresh and password reset responses may expose restricted user fieldsSame generic ecosystem
  • Payload: ReDoS in Multipart Content-Type ValidationSame generic ecosystem

Record context

Vulnerability class
SSRF
EPSS
Not reported
CWE IDs
CWE-918
Source
CVE List V5
Source checked
Oct 6, 2026
References
9 linked sources
Open source record