CVE-2026-58451 json
Horde IMP < 7.0.1 Path Traversal via Compose.php img src
published 2026-07-01 4 mo ago modified 2026-11-08 19 h ago also EUVD-2026-41111
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- horde imp 7.0.1
- github.com/horde/imp@fba972f commit
- github.com/horde/imp#85 pull request
- github.com/horde/imp/releases/tag/v7.0.1 release
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.evan.lat https://blog.evan.lat/posts/CVE-2026-58451/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- horde imp
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/horde/imp/pull/85
issue-tracking, patch
-
github.com
/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de
patch
-
blog.evan.lat
/posts/CVE-2026-58451/
technical-description, exploit
-
github.com
/horde/imp/releases/tag/v7.0.1
release-notes
-
horde.org
/apps/imp
product
-
vulncheck.com
/advisories/horde-imp-path-traversal-via-compose-php-img-src
third-party-advisory
- seclists.org /fulldisclosure/2026/Jul/8
Sources
- CVE List CVE-2026-58451
- NVD CVE-2026-58451
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.