CVE Explorer
CVE-2026-53599
REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"core","vendor":"redaxo","versions":[{"status":"affected","version":">= 5.18.2, < 5.21.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-434","description":"CWE-434: Unrestricted Upload of File with Dangerous Type","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"name":"https://github.com/redaxo/core/commit/462e36896bb65d292ba22d711044c23c9cfb0340","tags":["x_refsource_MISC"],"url":"https://github.com/redaxo/core/commit/462e36896bb65d292ba22d711044c23c9cfb0340"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/references/2
{"name":"https://github.com/redaxo/core/pull/6538","tags":["x_refsource_MISC"],"url":"https://github.com/redaxo/core/pull/6538"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/references/1
{"name":"https://github.com/redaxo/core/releases/tag/5.21.1","tags":["x_refsource_MISC"],"url":"https://github.com/redaxo/core/releases/tag/5.21.1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/adp/0/references/0
{"name":"https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25","tags":["x_refsource_CONFIRM"],"url":"https://github.com/redaxo/core/security/advisories/GHSA-98pp-vccm-qm25"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:d8e364b7839ee814613b1db10dc608230beef3e14ff1b8ec6729dad860a88e5b · sha256:f75deccc3ec99a86… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.