What is CVE-2017-1000423?

CVE-2017-1000423 is a critical-severity vulnerability in B2evolution, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-01-02.

How severe is CVE-2017-1000423?

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

Improper input validation in B2evolution

CVE-2017-1000423

b2evolution version 6.6.0 - 6.8.10 is vulnerable to input validation (backslash and single quote escape) in basic install functionality resulting in unauthenticated attacker gaining PHP code execution on the victim's setup.

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

Published 2018-01-02 · 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: 0.024 (83.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

B2evolution

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/b2evolution/b2evolution/commit/0096a3ebc85f6aadbda2c4427cd092a538b16… (Patch, Third Party Advisory)
github.com/b2evolution/b2evolution/commit/b899d654d931f3bf3cfbbdd71e0d1a0f3a16d… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2017-1000423?: CVE-2017-1000423 is a critical-severity vulnerability in B2evolution, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2018-01-02.
How severe is CVE-2017-1000423?: Critical severity. CVSS v3 base score is 9.8 out of 10.