{"id":"CVE-2026-54221","state":"PUBLISHED","title":"Reflected XSS in UBB.threads","description":"UBB.threads is vulnerable to Reflected XSS. The application improperly handles user input in certain requests, enabling attackers to execute arbitrary JavaScript in the context of a victim's browser by tricking them into clicking a crafted link. \nBecause vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions.","publishedAt":"2026-06-18T12:56:19.811Z","updatedAt":"2026-06-18T13:30:11.277Z","severity":{"score":5.1,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["UBB Systems UBB.threads"],"affected":[{"vendor":"UBB Systems","product":"UBB.threads","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"7.7.5","versionType":"semver"}]}],"references":["https://www.ubbcentral.com/","https://cert.pl/en/posts/2026/06/CVE-2026-54219"],"weaknesses":["CWE-79"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/54xxx/CVE-2026-54221.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-54221","state":"PUBLISHED","datePublished":"2026-06-18T12:56:19.811Z","dateUpdated":"2026-06-18T13:30:11.277Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-06-12T11:03:23.916Z"},"containers":{"cna":{"title":"Reflected XSS in UBB.threads","descriptions":[{"lang":"en","value":"UBB.threads is vulnerable to Reflected XSS. The application improperly handles user input in certain requests, enabling attackers to execute arbitrary JavaScript in the context of a victim's browser by tricking them into clicking a crafted link. \nBecause vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 7.7.5 but may also affect other versions."}],"affected":[{"vendor":"UBB Systems","product":"UBB.threads","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThanOrEqual":"7.7.5","versionType":"semver"}]}],"references":[{"url":"https://www.ubbcentral.com/","tags":["product"]},{"url":"https://cert.pl/en/posts/2026/06/CVE-2026-54219","tags":["third-party-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-06-18T12:56:19.811Z"},"credits":[{"lang":"en","type":"finder","value":"Kamil Szczurowski (Securitum)"},{"lang":"en","type":"finder","value":"Michał Wnękowicz (Securitum)"}],"datePublic":"2026-06-18T12:56:00.000Z","impacts":[{"capecId":"CAPEC-591","descriptions":[{"lang":"en","value":"CAPEC-591 Reflected XSS"}]}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-18T13:25:40.778408Z","id":"CVE-2026-54221","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":"2026-06-18T13:30:11.277Z"}}]}}}