What is CVE-2005-4891?

CVE-2005-4891 is a critical-severity vulnerability in Simple Machine Forum, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-01-15.

How severe is CVE-2005-4891?

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

SQL Injection in Simple Machine Forum

CVE-2005-4891

Simple Machine Forum (SMF) versions 1.0.4 and earlier have an SQL injection vulnerability that allows remote attackers to inject arbitrary SQL statements.

Vulnerability class: SQL Injection

Published 2020-01-15 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.017 (76.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 76.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000

Affected products

Simple Machine Forum — versions 1.0.4 and earlier
Simplemachines Simple Machine Forum

Weakness classification (CWE)

CWE-89 — SQL Injection

References

www.openwall.com/lists/oss-security/2012/11/14/10 (Mailing List, Third Party Advisory)
securiteam.com/exploits/5HP0N0KG0O/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2005-4891?: CVE-2005-4891 is a critical-severity vulnerability in Simple Machine Forum, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-01-15.
How severe is CVE-2005-4891?: Critical severity. CVSS v3 base score is 9.8 out of 10.