🛡️ CVE-2026-48946 — k2

🟡 CVSS 6.3 — Medium ✅ No Known Exploit CWE-434 NVD
6.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

The K2 frontend article-attachment upload path accepts files whose extension is .php, and Apache's standard mod_php matches \.php$ and executes them under the K2 web user. A K2 Author can upload a shell.php, then fetch /media/k2/attachments/shell.php and execute arbitrary PHP code in the web server's context.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.

Weakness class

CVE-2026-48946 is classified as CWE-434: Unrestricted Upload of File with Dangerous Type. Uploads are accepted without restricting type, so an executable file can be placed where the server will run it.

Affected software

CVE-2026-48946 is recorded against 1 package.

  • k2 (fixed in 2.26)

Timeline and source

Published on 25 June 2026 and last revised on 28 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

www.getk2.org

Details

Severity MEDIUM
CVSS Score 6.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CWE CWE-434
Public Exploit ✅ No
Source NVD
Published 2026-06-25
Updated 2026-08-11
Modified 2026-06-28
Fix URL N/A

Affected Packages

Software From version Fixed in
k2 — 2.26

References

Similar Threats

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