CVE-2026-48945 | The K2 article gallery upload path accepts a zip/tar archive… | CVSS 5.3 MEDIUM

Description

The K2 article gallery upload path accepts a zip/tar archive, extracts it under `/media/k2/galleries/<id>/`, and only renames image files (gif/jpg/jpeg/png/webp) to safe names — non-image files (including `.php`) are extracted as-is and remain executable via direct HTTP access.

Metadata

CVE ID: CVE-2026-48945
State: PUBLISHED
Assigner: Joomla
Reserved: 2026-05-26 16:47 UTC
Published: 2026-06-25 15:26 UTC
Last updated: 2026-06-25 18:45 UTC
Primary CWE: CWE-434
CWE-434 Unrestricted Upload via archive extraction
Vendor / Product: getk2.com / K2 extension for Joomla
Sources: cve.org · NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
getk2.com	K2 extension for Joomla	—	1.0-2.26

Weakness (CWE)

CWE	Source	Description
CWE-434	cna	CWE-434 Unrestricted Upload via archive extraction

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.3	MEDIUM	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References (1)

https://www.getk2.org/