CVE-2026-58451
Horde IMP < 7.0.1 Path Traversal via Compose.php img src
CVSS Score
6.5
EPSS Score
0.3%
EPSS Percentile
26th
Horde IMP before 7.0.1 contains a path traversal vulnerability in lib/Compose.php that allows authenticated attackers to read arbitrary files from the server filesystem by embedding traversal sequences after a CKEditor path prefix in img src URLs. Attackers can bypass the stripos() prefix validation by appending sequences such as traversal segments after the matching prefix, causing file_get_contents() to read sensitive files whose contents are then exfiltrated as MIME parts in outgoing email; unauthenticated exploitation is also achievable via CSRF against an active authenticated session.
| CWE | CWE-22 |
| Vendor | horde |
| Product | imp |
| Published | Jul 1, 2026 |
| Last Updated | Jul 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
horde / imp
0 < 7.0.1
References
github.com: https://github.com/horde/imp/releases/tag/v7.0.1 github.com: https://github.com/horde/imp/pull/85 github.com: https://github.com/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de horde.org: https://www.horde.org/apps/imp vulncheck.com: https://www.vulncheck.com/advisories/horde-imp-path-traversal-via-compose-php-img-src blog.evan.lat: https://blog.evan.lat/posts/CVE-2026-58451/
Credits
evan VulnCheck