What is CVE-2017-5215?

CVE-2017-5215 is a critical-severity vulnerability in Codextrous B2j Contact, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2017-05-17.

How severe is CVE-2017-5215?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Codextrous B2j Contact

CVE-2017-5215

The Codextrous B2J Contact (aka b2j_contact) extension before 2.1.13 for Joomla! allows a rename attack that bypasses a "safe file extension" protection mechanism, leading to remote code execution.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-05-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.036 (89.0th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000

Affected products

Codextrous B2j Contact

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

navixia.com/storage/app/media/uploaded-files/CVE/cve-2017-521415.txt (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-5215?: CVE-2017-5215 is a critical-severity vulnerability in Codextrous B2j Contact, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2017-05-17.
How severe is CVE-2017-5215?: Critical severity. CVSS v3 base score is 9.8 out of 10.