// For flags

CVE-2021-36845

YITH Maintenance Mode (WordPress plugin) <= 1.3.8 - Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities

Severity Score

4.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions <= 1.3.8, there are 46 vulnerable parameters that were missed by the vendor while patching the 1.3.7 version to 1.3.8. Vulnerable parameters: 1 - "Newsletter" tab, &yith_maintenance_newsletter_submit_label parameter: payload should start with a single quote (') symbol to break the context, i.e.: NOTIFY ME' autofocus onfocus=alert(/Visse/);// v=' - this payload will be auto triggered while admin visits this page/tab. 2 - "General" tab issues, vulnerable parameters: &yith_maintenance_message, &yith_maintenance_custom_style, &yith_maintenance_mascotte, &yith_maintenance_title_font[size], &yith_maintenance_title_font[family], &yith_maintenance_title_font[color], &yith_maintenance_paragraph_font[size], &yith_maintenance_paragraph_font[family], &yith_maintenance_paragraph_font[color], &yith_maintenance_border_top. 3 - "Background" tab issues, vulnerable parameters: &yith_maintenance_background_image, &yith_maintenance_background_color. 4 - "Logo" tab issues, vulnerable parameters: &yith_maintenance_logo_image, &yith_maintenance_logo_tagline, &yith_maintenance_logo_tagline_font[size], &yith_maintenance_logo_tagline_font[family], &yith_maintenance_logo_tagline_font[color]. 5 - "Newsletter" tab issues, vulnerable parameters: &yith_maintenance_newsletter_email_font[size], &yith_maintenance_newsletter_email_font[family], &yith_maintenance_newsletter_email_font[color], &yith_maintenance_newsletter_submit_font[size], &yith_maintenance_newsletter_submit_font[family], &yith_maintenance_newsletter_submit_font[color], &yith_maintenance_newsletter_submit_background, &yith_maintenance_newsletter_submit_background_hover, &yith_maintenance_newsletter_title, &yith_maintenance_newsletter_action, &yith_maintenance_newsletter_email_label, &yith_maintenance_newsletter_email_name, &yith_maintenance_newsletter_submit_label, &yith_maintenance_newsletter_hidden_fields. 6 - "Socials" tab issues, vulnerable parameters: &yith_maintenance_socials_facebook, &yith_maintenance_socials_twitter, &yith_maintenance_socials_gplus, &yith_maintenance_socials_youtube, &yith_maintenance_socials_rss, &yith_maintenance_socials_skype, &yith_maintenance_socials_email, &yith_maintenance_socials_behance, &yith_maintenance_socials_dribble, &yith_maintenance_socials_flickr, &yith_maintenance_socials_instagram, &yith_maintenance_socials_pinterest, &yith_maintenance_socials_tumblr, &yith_maintenance_socials_linkedin.

Múltiples vulnerabilidades de tipo Cross-Site Scripting (XSS) Almacenado y Autenticado en YITH Maintenance Mode (plugin de WordPress) versiones anteriores a 1.3.8 incluyéndola, hay 46 parámetros vulnerables que fueron pasados por alto por el proveedor mientras parcheaba la versión 1.3.7 a la 1.3.8. Parámetros vulnerables: 1 - Pestaña "Newsletter", parámetro &amp;yith_maintenance_newsletter_submit_label: el payload debe comenzar con un símbolo de comillas simples (') para romper el contexto, es decir: NOTIFY ME' autofocus onfocus=alert(/Visse/);// v=' - este payload se autodesencadenará mientras el administrador visite esta página/pestaña. 2 - Problemas de la pestaña "General", parámetros vulnerables: &amp;yith_maintenance_message, &amp;yith_maintenance_custom_style, &amp;yith_maintenance_mascotte, &amp;yith_maintenance_title_font[size], &amp;yith_maintenance_title_font[family], &amp;yith_maintenance_title_font[color], &amp;yith_maintenance_paragraph_font[size], &amp;yith_maintenance_paragraph_font[family], &amp;yith_maintenance_paragraph_font[color], &amp;yith_maintenance_border_top. 3 - Problemas con la pestaña "Background", parámetros vulnerables: &amp;yith_maintenance_background_image, &amp;yith_maintenance_background_color. 4 - Problemas con la pestaña "Logo", parámetros vulnerables: &amp;yith_maintenance_logo_image, &amp;yith_maintenance_logo_tagline_font, &amp;yith_maintenance_logo_tagline_font[size], &amp;yith_maintenance_logo_tagline_font[family], &amp;yith_maintenance_logo_tagline_font[color]. 5 - Problemas con la pestaña "Newsletter", parámetros vulnerables: &amp;yith_maintenance_newsletter_email_font[size], &amp;yith_maintenance_newsletter_email_font[family], &amp;yith_maintenance_newsletter_email_font[color], &amp;yith_maintenance_newsletter_submit_font[size], &amp;yith_maintenance_newsletter_submit_font[family], &amp;yith_maintenance_newsletter_submit_font[color], &amp;yith_maintenance_newsletter_submit_background, &amp;yith_maintenance_newsletter_submit_background_hover, &amp;yith_maintenance_newsletter_title, &amp;yith_maintenance_newsletter_action, &amp;yith_maintenance_newsletter_email_label, &amp;yith_maintenance_newsletter_email_name, &amp;yith_maintenance_newsletter_submit_label, &amp;yith_maintenance_newsletter_hidden_fields. 6 - Problemas de la pestaña "Socials", parámetros vulnerables: &amp;yith_maintenance_socials_facebook, &amp;yith_maintenance_socials_twitter, &amp;yith_maintenance_socials_gplus, &amp;yith_maintenance_socials_youtube, &amp;yith_maintenance_socials_rss, &amp;yith_maintenance_socials_skype, &amp;yith_maintenance_socials_email, &amp;yith_maintenance_socials_behance, &amp;yith_maintenance_socials_dribble, &amp;yith_maintenance_socials_flickr, &amp;yith_maintenance_socials_instagram, &amp;yith_maintenance_socials_pinterest, &amp;yith_maintenance_socials_tumblr, &amp;yith_maintenance_socials_linkedin

*Credits: Original researcher - Vlad Visse (Patchstack), research based on previously reported vulnerability by Asif Nawaz Minhas (Patchstack Red Team)
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
Single
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-07-19 CVE Reserved
  • 2021-09-23 CVE Published
  • 2023-04-20 EPSS Updated
  • 2024-09-17 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Yithemes
Search vendor "Yithemes"
Yith Maintenance Mode
Search vendor "Yithemes" for product "Yith Maintenance Mode"
<= 1.3.8
Search vendor "Yithemes" for product "Yith Maintenance Mode" and version " <= 1.3.8"
wordpress
Affected