What is CVE-2020-20300?

CVE-2020-20300 is a critical-severity vulnerability in Weiphp, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-12-18.

How severe is CVE-2020-20300?

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

Is CVE-2020-20300 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

SQL Injection in Weiphp

CVE-2020-20300

SQL injection vulnerability in the wp_where function in WeiPHP 5.0.

Vulnerability class: SQL Injection

Published 2020-12-18 · last modified 2026-06-17.

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: 0.088 (95.0th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.088 · newest: 0.088 · change: 0.000

Affected products

Weiphp — versions 5.0

Weakness classification (CWE)

CWE-89 — SQL Injection

Public proof-of-concept exploits

References

github.com/Y4er/Y4er.com/blob/master/content/post/weiphp-exp-sql.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-20300?: CVE-2020-20300 is a critical-severity vulnerability in Weiphp, classified under SQL Injection. CVSS score: 9.8/10. Published 2020-12-18.
How severe is CVE-2020-20300?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-20300 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.