What is CVE-2020-20299?

CVE-2020-20299 is a high-severity vulnerability in Weiphp. CVSS score: 7.5/10. Published 2020-12-18.

How severe is CVE-2020-20299?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2020-20299 known to be exploited?

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

Vulnerability in Weiphp

CVE-2020-20299

WeiPHP 5.0 does not properly restrict access to pages, related to using POST.

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.015 (73.0th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 73.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000

Affected products

Weiphp — versions 5.0

Public proof-of-concept exploits

References

github.com/Y4er/Y4er.com/blob/master/content/post/weiphp5-unauthorized.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-20299?: CVE-2020-20299 is a high-severity vulnerability in Weiphp. CVSS score: 7.5/10. Published 2020-12-18.
How severe is CVE-2020-20299?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2020-20299 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.