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CVE-2026-21857

REDAXO is a PHP-based content management system. Prior to version 5.20.2, authenticated users with backup permissions can read arbitrary files within the webroot via path traversal in the Backup addon's file export functionality. The Backup addon does not validate the `EXPDIR` POST parameter against the UI-generated allowlist of permitted directories. An attacker can supply relative paths containing `../` sequences (or even absolute paths inside the document root) to include any readable file in
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:756ddd028e030714719b4e07413b211806568e2175931eb227818a245e4be042
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-24","description":"CWE-24: Path Traversal: '../filedir'","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"redaxo","vendor":"redaxo","versions":[{"status":"affected","version":"< 5.20.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.3,"baseSeverity":"HIGH","privilegesRequired":"HIGH","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-24","description":"CWE-24: Path Traversal: '../filedir'","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/redaxo/redaxo/releases/tag/5.20.2","tags":["x_refsource_MISC"],"url":"https://github.com/redaxo/redaxo/releases/tag/5.20.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /containers/adp/0/references/0
{"name":"https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv","tags":["x_refsource_CONFIRM"],"url":"https://github.com/redaxo/redaxo/security/advisories/GHSA-824x-88xg-cwrv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ce677470ad41c8e04f64eca16b5a7efa5290dbe5dbfd6cb91225a4e0041b574a · sha256:26df2a7b62ca61b6… · /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.

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