CVE-2026-58451
Horde IMP < 7.0.1 Path Traversal via Compose.php img src
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.
INFO
Published Date :
July 1, 2026, 7:16 p.m.
Last Modified :
July 14, 2026, 11:17 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Upgrade Horde IMP to a fixed version.
- Apply vendor security patches immediately.
- Restrict access to sensitive files.
- Validate all user inputs.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-58451.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-58451 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-58451
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-58451 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-58451 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 14, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://github.com/horde/imp', 'vendor': 'horde', 'product': 'imp', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '7.0.1', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] [{'repo': 'https://github.com/horde/imp', 'vendor': 'horde', 'product': 'imp', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '7.0.1', 'versionType': 'semver'}], 'packageURL': 'pkg:github/horde/imp', 'defaultStatus': 'affected'}] -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 02, 2026
Action Type Old Value New Value Added Reference http://seclists.org/fulldisclosure/2026/Jul/8 -
CVE Modified by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added Reference https://blog.evan.lat/posts/CVE-2026-58451/ -
New CVE Received by [email protected]
Jul. 01, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/horde/imp', 'vendor': 'horde', 'product': 'imp', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '7.0.1', 'versionType': 'semver'}], 'defaultStatus': 'affected'}] Added 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. Added CVSS V4.0 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 Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-22 Added Reference https://github.com/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de Added Reference https://github.com/horde/imp/pull/85 Added Reference https://github.com/horde/imp/releases/tag/v7.0.1 Added Reference https://www.horde.org/apps/imp Added Reference https://www.vulncheck.com/advisories/horde-imp-path-traversal-via-compose-php-img-src -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 01, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-58451', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-01T18:41:12.206279Z'}