CVE-2021-36845

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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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-79 Cross-site Scripting (XSS)"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-36845", "STATE": "PUBLIC", "TITLE": "YITH Maintenance Mode (WordPress plugin) <= 1.3.8 - Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities", "ASSIGNER": "audit@patchstack.com", "DATE_PUBLIC": "2021-09-23T11:55:00.000Z"}}}}, "cveMetadata": {"cveId": "CVE-2021-36845", "state": "PUBLISHED", "dateUpdated": "2026-04-28T16:07:34.322Z", "dateReserved": "2021-07-19T00:00:00.000Z", "assignerOrgId": "21595511-bba5-4825-b968-b78d1f9984a3", "datePublished": "2021-09-27T15:36:56.716Z", "assignerShortName": "Patchstack"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "YITH Maintenance Mode (WordPress plugin)", "vendor": "YITH", "versions": [{"lessThanOrEqual": "1.3.8", "status": "affected", "version": "<= 1.3.8", "versionType": "custom"}]}], "source": "audit@patchstack.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:yithemes:yith_maintenance_mode:*:*:*:*:*:wordpress:*:*", "matchCriteriaId": "BC34C991-B0F5-4FB7-BA2A-4B5DF326E284", "versionEndIncluding": "1.3.8", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "M\u00faltiples vulnerabilidades de tipo Cross-Site Scripting (XSS) Almacenado y Autenticado en YITH Maintenance Mode (plugin de WordPress) versiones anteriores a 1.3.8 incluy\u00e9ndola, hay 46 par\u00e1metros vulnerables que fueron pasados por alto por el proveedor mientras parcheaba la versi\u00f3n 1.3.7 a la 1.3.8. Par\u00e1metros vulnerables: 1 - Pesta\u00f1a \"Newsletter\", par\u00e1metro &amp;yith_maintenance_newsletter_submit_label: el payload debe comenzar con un s\u00edmbolo de comillas simples (') para romper el contexto, es decir: NOTIFY ME' autofocus onfocus=alert(/Visse/);// v=' - este payload se autodesencadenar\u00e1 mientras el administrador visite esta p\u00e1gina/pesta\u00f1a. 2 - Problemas de la pesta\u00f1a \"General\", par\u00e1metros 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 pesta\u00f1a \"Background\", par\u00e1metros vulnerables: &amp;yith_maintenance_background_image, &amp;yith_maintenance_background_color. 4 - Problemas con la pesta\u00f1a \"Logo\", par\u00e1metros 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 pesta\u00f1a \"Newsletter\", par\u00e1metros 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 pesta\u00f1a \"Socials\", par\u00e1metros 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"}], "id": "CVE-2021-36845", "lastModified": "2026-06-17T03:59:30.450", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 3.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:S/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 6.8, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 4.7, "source": "audit@patchstack.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.7, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-36845", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-03-28T16:49:24.310788Z", "version": "2.0.3"}}]}, "published": "2021-09-27T16:15:09.377", "references": [{"source": "audit@patchstack.com", "tags": ["Vendor 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"}, {"source": "audit@patchstack.com", "tags": ["Third Party Advisory"], "url": "https://wordpress.org/plugins/yith-maintenance-mode/#developers"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor 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"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://wordpress.org/plugins/yith-maintenance-mode/#developers"}], "sourceIdentifier": "audit@patchstack.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "audit@patchstack.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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