# CVE-2026-104081: KodExplorer < 4.55 Path Traversal via unzip_pre_name() ZIP Extraction

Status: published. Published: 2026-10-09. Updated: 2026-11-08.

KodExplorer before 4.55 contains a path traversal vulnerability in the unzip_pre_name() function within app/function/helper.function.php, where a single non-recursive str_replace() sanitization pass can be bypassed using crafted filenames like "....//", combined with PclZip's extract() call in KodArchive.class.php lacking the PCLZIP_OPT_EXTRACT_DIR_RESTRICTION option. Authenticated attackers can upload a malicious ZIP archive with traversal sequences to overwrite arbitrary files such as core JavaScript assets, enabling stored XSS that leads to admin account takeover and subsequent remote code execution via unrestricted PHP file upload.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/kalcaddle/KodExplorer/releases/tag/4.55

## Affected products and versions

- kalcaddle / KodExplorer (kalcaddle/KodExplorer): ≥ 0; < 4.55 (affected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 7.2 (high); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 8.1 (high); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.77% as of 2026-11-08; percentile 55.76%

- SSVC: exploitation none; automatable no; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-22

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/kalcaddle/KodExplorer/releases/tag/4.55 (CNA: VulnCheck; release-notes, patch)

- https://www.vulncheck.com/advisories/kodexplorer-path-traversal-via-unzip-pre-name-zip-extraction (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-104081; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-104081; retrieved 2026-11-08; source updated Not reported

Revision: fe6c38db60b3eb1b88b70421642ac2741062e43eef0b7c60f8ef96d099e31474

Canonical: https://y2.dev/cve/CVE-2026-104081

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