{"id":"CVE-2021-36845","aliases":["EUVD-2021-23421","GHSA-ppc5-qvp7-3j6h"],"status":"published","title":"YITH Maintenance Mode (WordPress plugin) \u003c= 1.3.8 - Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities","description":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions \u003c= 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, \u0026yith_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: \u0026yith_maintenance_message, \u0026yith_maintenance_custom_style, \u0026yith_maintenance_mascotte, \u0026yith_maintenance_title_font[size], \u0026yith_maintenance_title_font[family], \u0026yith_maintenance_title_font[color], \u0026yith_maintenance_paragraph_font[size], \u0026yith_maintenance_paragraph_font[family], \u0026yith_maintenance_paragraph_font[color], \u0026yith_maintenance_border_top. 3 - \"Background\" tab issues, vulnerable parameters: \u0026yith_maintenance_background_image, \u0026yith_maintenance_background_color. 4 - \"Logo\" tab issues, vulnerable parameters: \u0026yith_maintenance_logo_image, \u0026yith_maintenance_logo_tagline, \u0026yith_maintenance_logo_tagline_font[size], \u0026yith_maintenance_logo_tagline_font[family], \u0026yith_maintenance_logo_tagline_font[color]. 5 - \"Newsletter\" tab issues, vulnerable parameters: \u0026yith_maintenance_newsletter_email_font[size], \u0026yith_maintenance_newsletter_email_font[family], \u0026yith_maintenance_newsletter_email_font[color], \u0026yith_maintenance_newsletter_submit_font[size], \u0026yith_maintenance_newsletter_submit_font[family], \u0026yith_maintenance_newsletter_submit_font[color], \u0026yith_maintenance_newsletter_submit_background, \u0026yith_maintenance_newsletter_submit_background_hover, \u0026yith_maintenance_newsletter_title, \u0026yith_maintenance_newsletter_action, \u0026yith_maintenance_newsletter_email_label, \u0026yith_maintenance_newsletter_email_name, \u0026yith_maintenance_newsletter_submit_label, \u0026yith_maintenance_newsletter_hidden_fields. 6 - \"Socials\" tab issues, vulnerable parameters: \u0026yith_maintenance_socials_facebook, \u0026yith_maintenance_socials_twitter, \u0026yith_maintenance_socials_gplus, \u0026yith_maintenance_socials_youtube, \u0026yith_maintenance_socials_rss, \u0026yith_maintenance_socials_skype, \u0026yith_maintenance_socials_email, \u0026yith_maintenance_socials_behance, \u0026yith_maintenance_socials_dribble, \u0026yith_maintenance_socials_flickr, \u0026yith_maintenance_socials_instagram, \u0026yith_maintenance_socials_pinterest, \u0026yith_maintenance_socials_tumblr, \u0026yith_maintenance_socials_linkedin.","severity":{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00715,"percentile":0.54167,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-79"],"published":"2021-09-27T15:36:56Z","modified":"2026-06-17T03:59:30Z","products":[{"vendor":"yith","product":"yith maintenance mode (wordpress plugin)"},{"vendor":"yithemes","product":"yith_maintenance_mode"}],"references":[{"url":"https://wordpress.org/plugins/yith-maintenance-mode/#developers","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"https://patchstack.com/database/vulnerability/yith-maintenance-mode/wordpress-yith-maintenance-mode-plugin-1-3-8-multiple-authenticated-stored-cross-site-scripting-xss-vulnerabilities","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-36845"},{"url":"https://github.com/advisories/GHSA-ppc5-qvp7-3j6h"}],"sources":{"cve":[{"id":"CVE-2021-36845","title":"YITH Maintenance Mode (WordPress plugin) \u003c= 1.3.8 - Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities","description":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions \u003c= 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, \u0026yith_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: \u0026yith_maintenance_message, \u0026yith_maintenance_custom_style, \u0026yith_maintenance_mascotte, \u0026yith_maintenance_title_font[size], \u0026yith_maintenance_title_font[family], \u0026yith_maintenance_title_font[color], \u0026yith_maintenance_paragraph_font[size], \u0026yith_maintenance_paragraph_font[family], \u0026yith_maintenance_paragraph_font[color], \u0026yith_maintenance_border_top. 3 - \"Background\" tab issues, vulnerable parameters: \u0026yith_maintenance_background_image, \u0026yith_maintenance_background_color. 4 - \"Logo\" tab issues, vulnerable parameters: \u0026yith_maintenance_logo_image, \u0026yith_maintenance_logo_tagline, \u0026yith_maintenance_logo_tagline_font[size], \u0026yith_maintenance_logo_tagline_font[family], \u0026yith_maintenance_logo_tagline_font[color]. 5 - \"Newsletter\" tab issues, vulnerable parameters: \u0026yith_maintenance_newsletter_email_font[size], \u0026yith_maintenance_newsletter_email_font[family], \u0026yith_maintenance_newsletter_email_font[color], \u0026yith_maintenance_newsletter_submit_font[size], \u0026yith_maintenance_newsletter_submit_font[family], \u0026yith_maintenance_newsletter_submit_font[color], \u0026yith_maintenance_newsletter_submit_background, \u0026yith_maintenance_newsletter_submit_background_hover, \u0026yith_maintenance_newsletter_title, \u0026yith_maintenance_newsletter_action, \u0026yith_maintenance_newsletter_email_label, \u0026yith_maintenance_newsletter_email_name, \u0026yith_maintenance_newsletter_submit_label, \u0026yith_maintenance_newsletter_hidden_fields. 6 - \"Socials\" tab issues, vulnerable parameters: \u0026yith_maintenance_socials_facebook, \u0026yith_maintenance_socials_twitter, \u0026yith_maintenance_socials_gplus, \u0026yith_maintenance_socials_youtube, \u0026yith_maintenance_socials_rss, \u0026yith_maintenance_socials_skype, \u0026yith_maintenance_socials_email, \u0026yith_maintenance_socials_behance, \u0026yith_maintenance_socials_dribble, \u0026yith_maintenance_socials_flickr, \u0026yith_maintenance_socials_instagram, \u0026yith_maintenance_socials_pinterest, \u0026yith_maintenance_socials_tumblr, \u0026yith_maintenance_socials_linkedin.","status":"published","published":"2021-09-27T15:36:56.716Z","modified":"2026-04-28T16:07:34.322Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:33:06.32268Z"}],"euvd":[{"id":"EUVD-2021-23421","description":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions \u003c= 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, \u0026yith_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: \u0026yith_maintenance_message, \u0026yith_maintenance_custom_style, \u0026yith_maintenance_mascotte, \u0026yith_maintenance_title_font[size], \u0026yith_maintenance_title_font[family], \u0026yith_maintenance_title_font[color], \u0026yith_maintenance_paragraph_font[size], \u0026yith_maintenance_paragraph_font[family], \u0026yith_maintenance_paragraph_font[color], \u0026yith_maintenance_border_top. 3 - \"Background\" tab issues, vulnerable parameters: \u0026yith_maintenance_background_image, \u0026yith_maintenance_background_color. 4 - \"Logo\" tab issues, vulnerable parameters: \u0026yith_maintenance_logo_image, \u0026yith_maintenance_logo_tagline, \u0026yith_maintenance_logo_tagline_font[size], \u0026yith_maintenance_logo_tagline_font[family], \u0026yith_maintenance_logo_tagline_font[color]. 5 - \"Newsletter\" tab issues, vulnerable parameters: \u0026yith_maintenance_newsletter_email_font[size], \u0026yith_maintenance_newsletter_email_font[family], \u0026yith_maintenance_newsletter_email_font[color], \u0026yith_maintenance_newsletter_submit_font[size], \u0026yith_maintenance_newsletter_submit_font[family], \u0026yith_maintenance_newsletter_submit_font[color], \u0026yith_maintenance_newsletter_submit_background, \u0026yith_maintenance_newsletter_submit_background_hover, \u0026yith_maintenance_newsletter_title, \u0026yith_maintenance_newsletter_action, \u0026yith_maintenance_newsletter_email_label, \u0026yith_maintenance_newsletter_email_name, \u0026yith_maintenance_newsletter_submit_label, \u0026yith_maintenance_newsletter_hidden_fields. 6 - \"Socials\" tab issues, vulnerable parameters: \u0026yith_maintenance_socials_facebook, \u0026yith_maintenance_socials_twitter, \u0026yith_maintenance_socials_gplus, \u0026yith_maintenance_socials_youtube, \u0026yith_maintenance_socials_rss, \u0026yith_maintenance_socials_skype, \u0026yith_maintenance_socials_email, \u0026yith_maintenance_socials_behance, \u0026yith_maintenance_socials_dribble, \u0026yith_maintenance_socials_flickr, \u0026yith_maintenance_socials_instagram, \u0026yith_maintenance_socials_pinterest, \u0026yith_maintenance_socials_tumblr, \u0026yith_maintenance_socials_linkedin.","status":"published","published":"2021-09-27T15:36:56Z","modified":"2026-04-28T16:07:34Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T19:24:16.393887Z"}],"ghsa":[{"id":"GHSA-ppc5-qvp7-3j6h","title":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode...","description":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions \u003c= 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, \u0026yith_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: \u0026yith_maintenance_message, \u0026yith_maintenance_custom_style, \u0026yith_maintenance_mascotte, \u0026yith_maintenance_title_font[size], \u0026yith_maintenance_title_font[family], \u0026yith_maintenance_title_font[color], \u0026yith_maintenance_paragraph_font[size], \u0026yith_maintenance_paragraph_font[family], \u0026yith_maintenance_paragraph_font[color], \u0026yith_maintenance_border_top. 3 - \"Background\" tab issues, vulnerable parameters: \u0026yith_maintenance_background_image, \u0026yith_maintenance_background_color. 4 - \"Logo\" tab issues, vulnerable parameters: \u0026yith_maintenance_logo_image, \u0026yith_maintenance_logo_tagline, \u0026yith_maintenance_logo_tagline_font[size], \u0026yith_maintenance_logo_tagline_font[family], \u0026yith_maintenance_logo_tagline_font[color]. 5 - \"Newsletter\" tab issues, vulnerable parameters: \u0026yith_maintenance_newsletter_email_font[size], \u0026yith_maintenance_newsletter_email_font[family], \u0026yith_maintenance_newsletter_email_font[color], \u0026yith_maintenance_newsletter_submit_font[size], \u0026yith_maintenance_newsletter_submit_font[family], \u0026yith_maintenance_newsletter_submit_font[color], \u0026yith_maintenance_newsletter_submit_background, \u0026yith_maintenance_newsletter_submit_background_hover, \u0026yith_maintenance_newsletter_title, \u0026yith_maintenance_newsletter_action, \u0026yith_maintenance_newsletter_email_label, \u0026yith_maintenance_newsletter_email_name, \u0026yith_maintenance_newsletter_submit_label, \u0026yith_maintenance_newsletter_hidden_fields. 6 - \"Socials\" tab issues, vulnerable parameters: \u0026yith_maintenance_socials_facebook, \u0026yith_maintenance_socials_twitter, \u0026yith_maintenance_socials_gplus, \u0026yith_maintenance_socials_youtube, \u0026yith_maintenance_socials_rss, \u0026yith_maintenance_socials_skype, \u0026yith_maintenance_socials_email, \u0026yith_maintenance_socials_behance, \u0026yith_maintenance_socials_dribble, \u0026yith_maintenance_socials_flickr, \u0026yith_maintenance_socials_instagram, \u0026yith_maintenance_socials_pinterest, \u0026yith_maintenance_socials_tumblr, \u0026yith_maintenance_socials_linkedin.","status":"published","published":"2022-05-24T19:15:48Z","modified":"2023-01-30T05:02:20Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:46:37.149934Z"}],"nvd":[{"id":"CVE-2021-36845","description":"Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities in YITH Maintenance Mode (WordPress plugin) versions \u003c= 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, \u0026yith_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: \u0026yith_maintenance_message, \u0026yith_maintenance_custom_style, \u0026yith_maintenance_mascotte, \u0026yith_maintenance_title_font[size], \u0026yith_maintenance_title_font[family], \u0026yith_maintenance_title_font[color], \u0026yith_maintenance_paragraph_font[size], \u0026yith_maintenance_paragraph_font[family], \u0026yith_maintenance_paragraph_font[color], \u0026yith_maintenance_border_top. 3 - \"Background\" tab issues, vulnerable parameters: \u0026yith_maintenance_background_image, \u0026yith_maintenance_background_color. 4 - \"Logo\" tab issues, vulnerable parameters: \u0026yith_maintenance_logo_image, \u0026yith_maintenance_logo_tagline, \u0026yith_maintenance_logo_tagline_font[size], \u0026yith_maintenance_logo_tagline_font[family], \u0026yith_maintenance_logo_tagline_font[color]. 5 - \"Newsletter\" tab issues, vulnerable parameters: \u0026yith_maintenance_newsletter_email_font[size], \u0026yith_maintenance_newsletter_email_font[family], \u0026yith_maintenance_newsletter_email_font[color], \u0026yith_maintenance_newsletter_submit_font[size], \u0026yith_maintenance_newsletter_submit_font[family], \u0026yith_maintenance_newsletter_submit_font[color], \u0026yith_maintenance_newsletter_submit_background, \u0026yith_maintenance_newsletter_submit_background_hover, \u0026yith_maintenance_newsletter_title, \u0026yith_maintenance_newsletter_action, \u0026yith_maintenance_newsletter_email_label, \u0026yith_maintenance_newsletter_email_name, \u0026yith_maintenance_newsletter_submit_label, \u0026yith_maintenance_newsletter_hidden_fields. 6 - \"Socials\" tab issues, vulnerable parameters: \u0026yith_maintenance_socials_facebook, \u0026yith_maintenance_socials_twitter, \u0026yith_maintenance_socials_gplus, \u0026yith_maintenance_socials_youtube, \u0026yith_maintenance_socials_rss, \u0026yith_maintenance_socials_skype, \u0026yith_maintenance_socials_email, \u0026yith_maintenance_socials_behance, \u0026yith_maintenance_socials_dribble, \u0026yith_maintenance_socials_flickr, \u0026yith_maintenance_socials_instagram, \u0026yith_maintenance_socials_pinterest, \u0026yith_maintenance_socials_tumblr, \u0026yith_maintenance_socials_linkedin.","status":"published","published":"2021-09-27T16:15:09.377Z","modified":"2026-06-17T03:59:30.45Z","cvss":[{"version":"3.1","score":6.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:06:58.933037Z"}]}}