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Advisories

Contao 4.0.0 before 5.3.54, 5.4.0 before 5.7.17, and 6.0.0 before 6.0.6 Path Traversal via Image Insert Tag

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Severity
medium
Date
Affecting

  • Contao >= 4.0.0, < 5.3.54

  • Contao >= 5.4.0-RC1, < 5.7.17

  • Contao >= 6.0.0-RC1, < 6.0.6

CWE
  • CWE-180 Incorrect Behavior Order: Validate Before Canonicalize
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Credit
AlpetGexha, ausi
Description
Contao 4.0.0 before 5.3.54, 5.4.0 before 5.7.17, and 6.0.0 before 6.0.6 contains a path traversal vulnerability that allows content editors to read image files anywhere on the filesystem via the {{image::}} insert tag. Attackers can embed percent-encoded sequences like ..%2f that pass Validator::isInsecurePath() before rawurldecode(), making the frontend resize and serve readable image files outside the files directory.

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