CVE-2026-58451

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://blog.evan.lat/posts/CVE-2026-58451/
https://github.com/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de
https://github.com/horde/imp/pull/85
https://github.com/horde/imp/releases/tag/v7.0.1
https://www.horde.org/apps/imp
https://www.vulncheck.com/advisories/horde-imp-path-traversal-via-compose-php-img-src
http://seclists.org/fulldisclosure/2026/Jul/8

Configurations

No configuration.

History

02 Jul 2026, 20:17

Type	Values Removed	Values Added
References		() http://seclists.org/fulldisclosure/2026/Jul/8 -

02 Jul 2026, 15:17

Type	Values Removed	Values Added
References		() https://blog.evan.lat/posts/CVE-2026-58451/ -

01 Jul 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-01 19:16

Updated : 2026-07-14 23:17

NVD link : CVE-2026-58451

Mitre link : CVE-2026-58451

CVE.ORG link : CVE-2026-58451

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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