CVE-2026-29963

HIGH

HSC MailInspector 5.3.3-7 - Path Traversal

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-29963. PoCs published by sql3t0.

AI-analyzed exploit summary This repository contains a detailed technical writeup for CVE-2026-29963, describing a path traversal vulnerability in MailInspector v5.3.3-7. The vulnerability allows attackers to read arbitrary files via the `ext` parameter in `/mailinspector/tap/dw.php` due to improper path validation.

Description

HSC MailInspector 5.3.3-7 has a Path Traversal vulnerability due to improper validation of user-supplied input in the /tap/dw.php endpoint. The text parameter is used to construct file paths without adequate normalization or restriction to a safe base directory. A remote attacker can exploit this flaw to access arbitrary files on the underlying operating system, resulting in unauthorized disclosure of sensitive information.

Exploits (1)

github WRITEUP
by sql3t0 · poc
https://github.com/sql3t0/cve-disclosures/tree/main/02_-_CVE-2026-29963_LFI+Path_Traversal.md

This repository contains a detailed technical writeup for CVE-2026-29963, describing a path traversal vulnerability in MailInspector v5.3.3-7. The vulnerability allows attackers to read arbitrary files via the `ext` parameter in `/mailinspector/tap/dw.php` due to improper path validation.

Classification
Writeup 95%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: MailInspector v5.3.3-7
No auth needed
Prerequisites: access to the vulnerable endpoint `/mailinspector/tap/dw.php`
devstral-2 · analyzed May 18, 2026 Full analysis →

References (3)

Core 3

Scores

CVSS v3 7.5
EPSS 0.0013
EPSS Percentile 32.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (1)
hsclabs/mailinspector 5.3.3-7
Published May 18, 2026
Tracked Since May 18, 2026