{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115480","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-22T15:06:52.738Z","datePublished":"2026-10-23T13:37:32.184Z","dateUpdated":"2026-10-29T17:46:42.337Z"},"containers":{"cna":{"title":"baserCMS: Public Web API mail-form submission bypasses image CAPTCHA","problemTypes":[{"descriptions":[{"cweId":"CWE-799","lang":"en","description":"CWE-799: Improper Control of Interaction Frequency","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-693","lang":"en","description":"CWE-693: Protection Mechanism Failure","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-cpxq-6gjp-m59g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g"},{"name":"https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61","tags":["x_refsource_MISC"],"url":"https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61"},{"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":">= 5.0.0, < 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":"2026-10-23T13:37:32.184Z"},"descriptions":[{"lang":"en","value":"baserCMS is a website development framework. In versions 5.0.0 before 5.3.2 and 5.4.0 before 5.4.2, the public POST /baser/api/bc-mail/mail_messages/add/{mailContentId}.json endpoint accepts submissions without enforcing the form's auth_captcha setting. BcMail\\Controller\\Api\\MailMessagesController::add() and MailMessagesService::create() omit the BcCaptchaService::check() verification of captcha_id and auth_captcha performed by MailController::submit() in the web UI. An unauthenticated attacker who can reach the API can therefore automate submissions without solving the enabled image challenge. The API disables FormProtection and has no rate limit; submissions can generate administrator-inbox spam, send attacker-influenced auto-replies to third parties when an email field is present, and accumulate mail_messages database records when save_info is enabled. The API already enforces the isAccepting() check added for CVE-2026-30878; the missing CAPTCHA check is a separate control failure. This issue has been patched in versions 5.3.2 and 5.4.2."}],"source":{"advisory":"GHSA-cpxq-6gjp-m59g","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T17:45:56.666716Z","id":"CVE-2026-115480","options":[{"Exploitation":"poc"},{"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":"2026-10-29T17:46:42.337Z"}}]}}