The plugin does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator. Timeline (WPScanTeam): June 28th, 2021 - Details sent to vendor July 9th, 2021 - Escalated to WP due to lack of response from vendor July 27th, 2021 - No update, disclosing August 9th, 2021 - v1.3.22 released, fixing the issue
{"id": "WPEX-ID:ED9D26BE-CC96-4274-A05B-0B7AD9D8CFD9", "type": "wpexploit", "bulletinFamily": "exploit", "title": "Favicon by RealFaviconGenerator < 1.3.22 - Reflected Cross-Site Scripting (XSS)", "description": "The plugin does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator. Timeline (WPScanTeam): June 28th, 2021 - Details sent to vendor July 9th, 2021 - Escalated to WP due to lack of response from vendor July 27th, 2021 - No update, disclosing August 9th, 2021 - v1.3.22 released, fixing the issue \n", "published": "2021-07-27T00:00:00", "modified": "2021-08-10T07:33:23", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}, "cvss2": {}, "cvss3": {}, "href": "", "reporter": "renniepak", "references": ["https://wordpress.org/support/topic/wp-engine-security-plugin-vulnerability-notification/"], "cvelist": ["CVE-2021-24437"], "immutableFields": [], "lastseen": "2021-09-14T23:39:32", "viewCount": 129, "enchantments": {"dependencies": {"references": [{"type": "cve", "idList": ["CVE-2021-24437"]}, {"type": "wpvulndb", "idList": ["WPVDB-ID:ED9D26BE-CC96-4274-A05B-0B7AD9D8CFD9"]}], "rev": 4}, "score": {"value": 3.8, "vector": "NONE"}, "backreferences": {"references": [{"type": "cve", "idList": ["CVE-2021-24437"]}, {"type": "wpvulndb", "idList": ["WPVDB-ID:ED9D26BE-CC96-4274-A05B-0B7AD9D8CFD9"]}]}, "exploitation": null, "vulnersScore": 3.8}, "sourceData": "Affected parameter: json_result_url\r\n\r\nhttps://example.com/wp-admin/themes.php?page=favicon-by-realfavicongenerator%2Fadmin%2Fclass-favicon-by-realfavicongenerator-admin.phpfavicon_appearance_menu&json_result_url=%3Cimg%20src=x%20onerror=alert(document.domain)%3E", "generation": 0, "_state": {"dependencies": 1646301649}}
{"cve": [{"lastseen": "2022-03-23T14:54:38", "description": "The Favicon by RealFaviconGenerator WordPress plugin through 1.3.20 does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator.", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2021-08-30T15:15:00", "type": "cve", "title": "CVE-2021-24437", "cwe": ["CWE-79"], "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-24437"], "modified": "2021-09-02T13:59:00", "cpe": [], "id": "CVE-2021-24437", "href": "https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-24437", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}, "cpe23": []}], "patchstack": [{"lastseen": "2022-06-01T19:31:15", "description": "Reflected Cross-Site Scripting (XSS) vulnerability discovered by renniepak in WordPress Favicon plugin (versions <= 1.3.20).\n\n## Solution\n\n\r\n According to WPScanTeam, there were attempts to contact the vendor, but the vulnerability was disclosed due to the vendor's lack of response.\r\n\r\nTimeline (WPScanTeam):\r\nJune 28th, 2021 - Details sent to vendor\r\nJuly 9th, 2021 - Escalated to WP due to lack of response from vendor\r\nJuly 27th, 2021 - No update, disclosing\r\nAugust 9th, 2021 - v1.3.22 released, fixing the issue\r\n ", "cvss3": {"exploitabilityScore": 2.8, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "NETWORK", "availabilityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "baseScore": 6.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1", "userInteraction": "REQUIRED"}, "impactScore": 2.7}, "published": "2021-07-27T00:00:00", "type": "patchstack", "title": "WordPress Favicon plugin <= 1.3.20 - Reflected Cross-Site Scripting (XSS) vulnerability", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 8.6, "obtainAllPrivilege": false, "userInteractionRequired": true, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "NONE", "availabilityImpact": "NONE", "integrityImpact": "PARTIAL", "baseScore": 4.3, "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2021-24437"], "modified": "2021-07-27T00:00:00", "id": "PATCHSTACK:F1DD383B93875E156BF7B5AE04375FC4", "href": "https://patchstack.com/database/vulnerability/favicon-by-realfavicongenerator/wordpress-favicon-plugin-1-3-20-reflected-cross-site-scripting-xss-vulnerability", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}], "wpvulndb": [{"lastseen": "2021-09-14T23:39:32", "description": "The plugin does not sanitise or escape one of its parameter before outputting it back in the response, leading to a Reflected Cross-Site Scripting (XSS) which is executed in the context of a logged administrator. Timeline (WPScanTeam): June 28th, 2021 - Details sent to vendor July 9th, 2021 - Escalated to WP due to lack of response from vendor July 27th, 2021 - No update, disclosing August 9th, 2021 - v1.3.22 released, fixing the issue \n\n### PoC\n\nAffected parameter: json_result_url https://example.com/wp-admin/themes.php?page=favicon-by-realfavicongenerator%2Fadmin%2Fclass-favicon-by-realfavicongenerator-admin.phpfavicon_appearance_menu&json;_result_url=%3Cimg%20src=x%20onerror=alert(document.domain)%3E\n", "cvss3": {}, "published": "2021-07-27T00:00:00", "type": "wpvulndb", "title": "Favicon by RealFaviconGenerator < 1.3.22 - Reflected Cross-Site Scripting (XSS)", "bulletinFamily": "software", "cvss2": {}, "cvelist": ["CVE-2021-24437"], "modified": "2021-08-10T07:33:23", "id": "WPVDB-ID:ED9D26BE-CC96-4274-A05B-0B7AD9D8CFD9", "href": "https://wpscan.com/vulnerability/ed9d26be-cc96-4274-a05b-0b7ad9d8cfd9", "sourceData": "", "cvss": {"score": 4.3, "vector": "AV:N/AC:M/Au:N/C:N/I:P/A:N"}}]}