{"id":"CVE-2026-115481","state":"PUBLISHED","title":"baserCMS: BcCustomContent file fields can be configured to allow executable file extensions such as php, leading to arbitrary PHP file upload","description":"baserCMS is a website development framework. Starting in version 5.0.0-beta1 and prior to versions 5.3.2 and 5.4.2, `PermissionGroupsService::build()` reads a plugin's `config/permission.php` to decide what each user group may reach. When that file is absent it writes a wildcard allow rule instead: `url` `/baser/<prefix>/<plugin>/*`, `method` `*`, `auth` true, for every non-admin group. BcCustomContent has no such file in any release. After an administrator installs it, the default `operators` group can store and execute arbitrary PHP under the document root. Versions 5.3.2 and 5.4.2 patch the issue.","publishedAt":"2026-10-23T13:34:26.038Z","updatedAt":"2026-10-23T14:58:03.802Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["baserproject basercms"],"affected":[{"vendor":"baserproject","product":"basercms","versions":[{"version":">= 5.0.0-beta1, < 5.3.2","status":"affected"},{"version":">= 5.4.0, < 5.4.2","status":"affected"}]}],"references":["https://github.com/baserproject/basercms/security/advisories/GHSA-8jrp-4h7c-m679","https://github.com/baserproject/basercms/commit/2ed19c878add5c26fc765572e0e77173c1f1fdb5","https://github.com/baserproject/basercms/commit/b0ef31b10dc6267b48ebc9a80d34bc7c4c09c311","https://github.com/baserproject/basercms/releases/tag/5.3.2","https://github.com/baserproject/basercms/releases/tag/5.4.2"],"weaknesses":["CWE-434"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/115xxx/CVE-2026-115481.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-115481","state":"PUBLISHED","datePublished":"2026-10-23T13:34:26.038Z","dateUpdated":"2026-10-23T14:58:03.802Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-22T15:06:52.738Z"},"containers":{"cna":{"title":"baserCMS: BcCustomContent file fields can be configured to allow executable file extensions such as php, leading to arbitrary PHP file upload","descriptions":[{"lang":"en","value":"baserCMS is a website development framework. Starting in version 5.0.0-beta1 and prior to versions 5.3.2 and 5.4.2, `PermissionGroupsService::build()` reads a plugin's `config/permission.php` to decide what each user group may reach. When that file is absent it writes a wildcard allow rule instead: `url` `/baser/<prefix>/<plugin>/*`, `method` `*`, `auth` true, for every non-admin group. BcCustomContent has no such file in any release. After an administrator installs it, the default `operators` group can store and execute arbitrary PHP under the document root. Versions 5.3.2 and 5.4.2 patch the issue."}],"affected":[{"vendor":"baserproject","product":"basercms","versions":[{"version":">= 5.0.0-beta1, < 5.3.2","status":"affected"},{"version":">= 5.4.0, < 5.4.2","status":"affected"}]}],"references":[{"url":"https://github.com/baserproject/basercms/security/advisories/GHSA-8jrp-4h7c-m679","name":"https://github.com/baserproject/basercms/security/advisories/GHSA-8jrp-4h7c-m679","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/baserproject/basercms/commit/2ed19c878add5c26fc765572e0e77173c1f1fdb5","name":"https://github.com/baserproject/basercms/commit/2ed19c878add5c26fc765572e0e77173c1f1fdb5","tags":["x_refsource_MISC"]},{"url":"https://github.com/baserproject/basercms/commit/b0ef31b10dc6267b48ebc9a80d34bc7c4c09c311","name":"https://github.com/baserproject/basercms/commit/b0ef31b10dc6267b48ebc9a80d34bc7c4c09c311","tags":["x_refsource_MISC"]},{"url":"https://github.com/baserproject/basercms/releases/tag/5.3.2","name":"https://github.com/baserproject/basercms/releases/tag/5.3.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/baserproject/basercms/releases/tag/5.4.2","name":"https://github.com/baserproject/basercms/releases/tag/5.4.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"ACTIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.5,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-434","lang":"en","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-23T13:34:26.038Z"},"source":{"advisory":"GHSA-8jrp-4h7c-m679","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-23T14:54:26.499088Z","id":"CVE-2026-115481","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-23T14:58:03.802Z"}}]}}}