{"id":"CVE-2026-3466","state":"PUBLISHED","title":"Cross-site scripting in dashlet title","description":"Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.","publishedAt":"2026-04-07T12:08:50.132Z","updatedAt":"2026-04-22T12:26:27.839Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N","source":"Checkmk"},"assigner":"Checkmk","products":["Checkmk GmbH Checkmk"],"affected":[{"vendor":"Checkmk GmbH","product":"Checkmk","defaultStatus":"unaffected","versions":[{"version":"2.2.0","status":"affected","versionType":"semver"},{"version":"2.3.0","status":"affected","lessThan":"2.3.0p46","versionType":"semver"},{"version":"2.4.0","status":"affected","lessThan":"2.4.0p25","versionType":"semver"},{"version":"2.5.0b1","status":"affected","lessThan":"2.5.0","versionType":"semver"}]}],"references":["https://checkmk.com/werk/19033","https://checkmk.com/werk/19583","https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-title"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/3xxx/CVE-2026-3466.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-3466","state":"PUBLISHED","datePublished":"2026-04-07T12:08:50.132Z","dateUpdated":"2026-04-22T12:26:27.839Z","assignerShortName":"Checkmk","assignerOrgId":"f7d6281c-4801-44ce-ace2-493291dedb0f","dateReserved":"2026-03-03T09:09:01.487Z"},"containers":{"cna":{"title":"Cross-site scripting in dashlet title","descriptions":[{"lang":"en","value":"Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard."}],"affected":[{"vendor":"Checkmk GmbH","product":"Checkmk","defaultStatus":"unaffected","versions":[{"version":"2.2.0","status":"affected","versionType":"semver"},{"version":"2.3.0","status":"affected","lessThan":"2.3.0p46","versionType":"semver"},{"version":"2.4.0","status":"affected","lessThan":"2.4.0p25","versionType":"semver"},{"version":"2.5.0b1","status":"affected","lessThan":"2.5.0","versionType":"semver"}]}],"references":[{"url":"https://checkmk.com/werk/19033","tags":["vendor-advisory"]},{"url":"https://checkmk.com/werk/19583","tags":["vendor-advisory"]},{"url":"https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-title","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"baseScore":8.5,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"Checkmk","orgId":"f7d6281c-4801-44ce-ace2-493291dedb0f","dateUpdated":"2026-04-22T12:26:27.839Z"},"credits":[{"lang":"en","type":"reporter","value":"Alex Williams (Pellera Technologies)"}],"impacts":[{"capecId":"CAPEC-592","descriptions":[{"lang":"en","value":"CAPEC-592: Stored XSS"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:checkmk:checkmk:2.2.0:*:*:*:*:*:*:*"},{"vulnerable":true,"criteria":"cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*","versionStartIncluding":"2.3.0","versionEndExcluding":"2.3.0p46"},{"vulnerable":true,"criteria":"cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*","versionStartIncluding":"2.4.0","versionEndExcluding":"2.4.0p25"},{"vulnerable":true,"criteria":"cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:*","versionStartIncluding":"2.5.0b1","versionEndExcluding":"2.5.0"}]}]}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-07T13:18:39.707466Z","id":"CVE-2026-3466","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-07T13:18:48.034Z"}}]}}}