CVE-2026-115480

{"id": "CVE-2026-115480", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115480", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-29T17:45:56.666716Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "baserproject", "product": "basercms", "versions": [{"status": "affected", "version": ">= 5.0.0, < 5.3.2"}, {"status": "affected", "version": ">= 5.4.0, < 5.4.2"}]}]}], "published": "2026-10-23T14:17:52.160", "references": [{"url": "https://github.com/baserproject/basercms/commit/3444154ca40f308ade8991e54459248f866dcf61", "source": "security-advisories@github.com"}, {"url": "https://github.com/baserproject/basercms/releases/tag/5.3.2", "source": "security-advisories@github.com"}, {"url": "https://github.com/baserproject/basercms/releases/tag/5.4.2", "source": "security-advisories@github.com"}, {"url": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g", "source": "security-advisories@github.com"}, {"url": "https://github.com/baserproject/basercms/security/advisories/GHSA-cpxq-6gjp-m59g", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-693"}, {"lang": "en", "value": "CWE-799"}]}], "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."}], "lastModified": "2026-10-29T18:17:24.010", "sourceIdentifier": "security-advisories@github.com"}