{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-105456","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","state":"PUBLISHED","assignerShortName":"CERT-PL","dateReserved":"2026-10-05T14:00:11.458Z","datePublished":"2026-10-30T15:22:07.644Z","dateUpdated":"2026-10-30T17:18:22.375Z"},"containers":{"cna":{"providerMetadata":{"orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","shortName":"CERT-PL","dateUpdated":"2026-10-30T15:22:07.644Z"},"title":"Stored XSS via HTML scrubber rule in RTIR","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-79","description":"CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-592","descriptions":[{"lang":"en","value":"CAPEC-592 Stored XSS"}]}],"affected":[{"vendor":"Best Practical Solutions","product":"RT for Incident Response","repo":"https://github.com/bestpractical/rtir","versions":[{"status":"affected","version":"5.0.0","lessThan":"5.0.11","versionType":"semver"},{"status":"affected","version":"6.0.0","lessThan":"6.0.4","versionType":"semver"}],"defaultStatus":"unaffected"}],"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0.0","versionEndExcluding":"5.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.0","versionEndExcluding":"6.0.4"}]}]}],"descriptions":[{"lang":"en","value":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.\n\n\nThis issue was fixed in version 5.0.11 and 6.0.4","supportingMedia":[{"type":"text/html","base64":false,"value":"RTIR extends RT's HTML scrubber to allow an internal link\n      placeholder, and the extension lets through any link that merely\n      contains the placeholder, including links using the executable\n      javascript: scheme. The change applies to the whole RT instance\n      once RTIR is installed, not only to RTIR's own queues. Anyone who\n      can add HTML content to a ticket on such an instance can store\n      such a link. That includes an unauthenticated sender of HTML email\n      to the Incident Reports queue, which RTIR opens to everyone by\n      default. Script runs when a user clicks the link, in that user's\n      session, and can act in RT with that user's authority.<div><br></div><div>This issue was fixed in version&nbsp;5.0.11 and 6.0.4</div>"}]}],"tags":["x_open-source"],"references":[{"url":"https://cert.pl/en/posts/2026/10/CVE-2026-105454","tags":["third-party-advisory"]},{"url":"https://requesttracker.com/rtir/","tags":["product"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","subIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N"}}],"credits":[{"lang":"en","value":"Mateusz Szymaniec (CERT.PL)","type":"finder"}],"source":{"discovery":"INTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-105456","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-30T17:05:31.942517Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-30T17:18:22.375Z"}}]}}