{"id":"CVE-2021-24964","state":"PUBLISHED","title":"LiteSpeed Cache < 4.4.4 - IP Check Bypass to Unauthenticated Stored XSS","description":"The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users.","publishedAt":"2022-01-03T12:49:08.000Z","updatedAt":"2025-05-22T18:39:45.298Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","source":"CISA-ADP"},"assigner":"WPScan","products":["Unknown LiteSpeed Cache"],"affected":[{"vendor":"Unknown","product":"LiteSpeed Cache","versions":[{"version":"4.4.4","status":"affected","lessThan":"4.4.4","versionType":"custom"}]}],"references":["https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T19:48:07.505Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/24xxx/CVE-2021-24964.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-24964","state":"PUBLISHED","datePublished":"2022-01-03T12:49:08.000Z","dateUpdated":"2025-05-22T18:39:45.298Z","assignerShortName":"WPScan","assignerOrgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81","dateReserved":"2021-01-14T00:00:00.000Z"},"containers":{"cna":{"title":"LiteSpeed Cache < 4.4.4 - IP Check Bypass to Unauthenticated Stored XSS","descriptions":[{"lang":"en","value":"The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users."}],"affected":[{"vendor":"Unknown","product":"LiteSpeed Cache","versions":[{"version":"4.4.4","status":"affected","lessThan":"4.4.4","versionType":"custom"}]}],"references":[{"url":"https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc","tags":["x_refsource_MISC"]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79 Cross-site Scripting (XSS)","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"WPScan","dateUpdated":"2022-01-03T12:49:08.000Z","orgId":"1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81"},"credits":[{"lang":"en","value":"Emil Kylander"}],"source":{"discovery":"EXTERNAL"},"x_generator":"WPScan CVE Generator","x_legacyV4Record":{"CVE_data_meta":{"ASSIGNER":"contact@wpscan.com","ID":"CVE-2021-24964","STATE":"PUBLIC","TITLE":"LiteSpeed Cache < 4.4.4 - IP Check Bypass to Unauthenticated Stored XSS"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"LiteSpeed Cache","version":{"version_data":[{"version_affected":"<","version_name":"4.4.4","version_value":"4.4.4"}]}}]},"vendor_name":"Unknown"}]}},"credit":[{"lang":"eng","value":"Emil Kylander"}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The LiteSpeed Cache WordPress plugin before 4.4.4 does not properly verify that requests are coming from QUIC.cloud servers, allowing attackers to make requests to certain endpoints by using a specific X-Forwarded-For header value. In addition, one of the endpoint could be used to set CSS code if a setting is enabled, which will then be output in some pages without being sanitised and escaped. Combining those two issues, an unauthenticated attacker could put Cross-Site Scripting payloads in pages visited by users."}]},"generator":"WPScan CVE Generator","problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79 Cross-site Scripting (XSS)"}]}]},"references":{"reference_data":[{"name":"https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc","refsource":"MISC","url":"https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc"}]},"source":{"discovery":"EXTERNAL"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://wpscan.com/vulnerability/e9966b3e-2eb9-4d70-8c18-6a829b4827cc","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T19:49:14.371Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"CHANGED","version":"3.1","baseScore":6.1,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"LOW"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-05-22T15:21:22.171177Z","id":"CVE-2021-24964","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-05-22T18:39:45.298Z"}}]}}}