CVE WatchJul 14, 2026

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 file

CVSS

6.5

Medium

EPSS

0.4%

p35

KEV

—

Exploit Today

0-100

Published: Jul 1, 2026 · Last modified: Jul 14, 2026 · CWE-22

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-262026-09-23

Technical description

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.

Official references

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