{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115479","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-22T15:06:52.738Z","datePublished":"2026-10-23T13:36:01.655Z","dateUpdated":"2026-10-30T20:03:07.037Z"},"containers":{"cna":{"title":"baserCMS: Mail-form auto-replies accept multiple visitor-controlled recipients","problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/baserproject/basercms/security/advisories/GHSA-w47c-4g8m-gjv9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-w47c-4g8m-gjv9"},{"name":"https://github.com/baserproject/basercms/commit/99e6257c9d5e2fa2bff2351defcb9fb37f69daf1","tags":["x_refsource_MISC"],"url":"https://github.com/baserproject/basercms/commit/99e6257c9d5e2fa2bff2351defcb9fb37f69daf1"},{"name":"https://github.com/baserproject/basercms/releases/tag/5.3.2","tags":["x_refsource_MISC"],"url":"https://github.com/baserproject/basercms/releases/tag/5.3.2"},{"name":"https://github.com/baserproject/basercms/releases/tag/5.4.2","tags":["x_refsource_MISC"],"url":"https://github.com/baserproject/basercms/releases/tag/5.4.2"}],"affected":[{"vendor":"baserproject","product":"basercms","versions":[{"version":">= 5.2.5, < 5.3.2","status":"affected"},{"version":">= 5.4.0, < 5.4.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-23T13:36:01.655Z"},"descriptions":[{"lang":"en","value":"baserCMS is a website development framework. In versions 5.2.5 before 5.3.2 and 5.4.0 before 5.4.2, an unauthenticated visitor can supply a comma-separated address list in a public mail form's email field and cause a single auto-reply to be addressed to multiple third parties. MailMessageMailer::sendFormToUser() passes the visitor-controlled userMail value to parseAndNormalizeMailAddresses(), which splits it with explode(',') and supplies every resulting address to setTo(). Newly created forms with an email-type field are affected when the separate, optional VALID_EMAIL server-side validation is not enabled; browser type=email validation does not prevent crafted requests. The bundled contact form enables VALID_EMAIL and is not affected. The auto-reply uses the site's sender identity and includes partially attacker-controlled content, allowing abuse of the site to deliver unsolicited mail. This issue has been patched in versions 5.3.2 and 5.4.2."}],"source":{"advisory":"GHSA-w47c-4g8m-gjv9","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-30T20:02:58.080021Z","id":"CVE-2026-115479","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-30T20:03:07.037Z"}}]}}