{"id":"CVE-2025-20378","state":"PUBLISHED","title":"Open Redirect on Web Login endpoint in Splunk Enterprise","description":"In Splunk Enterprise versions below 10.0.1, 9.4.5, 9.3.7, 9.2.9, and Splunk Cloud Platform versions below 10.0.2503.5, 9.3.2411.111, and 9.3.2408.121, an unauthenticated attacker could craft a malicious URL using the `return_to` parameter of the Splunk Web login endpoint. When an authenticated user visits the malicious URL, it could cause an unvalidated redirect to an external malicious site. To be successful, the attacker has to trick the victim into initiating a request from their browser. The unauthenticated attacker should not be able to exploit the vulnerability at will.","publishedAt":"2025-11-12T17:22:56.630Z","updatedAt":"2025-11-12T21:04:48.103Z","severity":{"score":3.1,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","source":"cisco"},"assigner":"cisco","products":["Splunk Splunk Enterprise","Splunk Splunk Cloud Platform"],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.0","status":"affected","lessThan":"10.0.1","versionType":"custom"},{"version":"9.4","status":"affected","lessThan":"9.4.5","versionType":"custom"},{"version":"9.3","status":"affected","lessThan":"9.3.7","versionType":"custom"},{"version":"9.2","status":"affected","lessThan":"9.2.9","versionType":"custom"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.0.2503","status":"affected","lessThan":"10.0.2503.5","versionType":"custom"},{"version":"9.3.2411","status":"affected","lessThan":"9.3.2411.111","versionType":"custom"},{"version":"9.3.2408","status":"affected","lessThan":"9.3.2408.121","versionType":"custom"}]}],"references":["https://advisory.splunk.com/advisories/SVD-2025-1101"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/20xxx/CVE-2025-20378.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-20378","state":"PUBLISHED","datePublished":"2025-11-12T17:22:56.630Z","dateUpdated":"2025-11-12T21:04:48.103Z","assignerShortName":"cisco","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateReserved":"2024-10-10T19:15:13.263Z"},"containers":{"cna":{"title":"Open Redirect on Web Login endpoint in Splunk Enterprise","descriptions":[{"lang":"en","value":"In Splunk Enterprise versions below 10.0.1, 9.4.5, 9.3.7, 9.2.9, and Splunk Cloud Platform versions below 10.0.2503.5, 9.3.2411.111, and 9.3.2408.121, an unauthenticated attacker could craft a malicious URL using the `return_to` parameter of the Splunk Web login endpoint. When an authenticated user visits the malicious URL, it could cause an unvalidated redirect to an external malicious site. To be successful, the attacker has to trick the victim into initiating a request from their browser. The unauthenticated attacker should not be able to exploit the vulnerability at will."}],"affected":[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.0","status":"affected","lessThan":"10.0.1","versionType":"custom"},{"version":"9.4","status":"affected","lessThan":"9.4.5","versionType":"custom"},{"version":"9.3","status":"affected","lessThan":"9.3.7","versionType":"custom"},{"version":"9.2","status":"affected","lessThan":"9.2.9","versionType":"custom"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.0.2503","status":"affected","lessThan":"10.0.2503.5","versionType":"custom"},{"version":"9.3.2411","status":"affected","lessThan":"9.3.2411.111","versionType":"custom"},{"version":"9.3.2408","status":"affected","lessThan":"9.3.2408.121","versionType":"custom"}]}],"references":[{"url":"https://advisory.splunk.com/advisories/SVD-2025-1101"}],"metrics":[{"cvssV3_1":{"vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1","baseScore":3.1,"baseSeverity":"LOW"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","type":"cwe","description":"A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks."}]}],"providerMetadata":{"shortName":"cisco","orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","dateUpdated":"2025-11-12T17:22:56.630Z"},"datePublic":"2025-11-12T00:00:00.000Z","source":{"advisory":"SVD-2025-1101"},"credits":[{"lang":"en","value":"Diogo Real (c0rte)"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-12T20:47:32.175559Z","id":"CVE-2025-20378","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-11-12T21:04:48.103Z"}}]}}}