What is CVE-2020-21124?

CVE-2020-21124 is a critical-severity vulnerability in Ureport Project, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2021-09-15.

How severe is CVE-2020-21124?

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

Is CVE-2020-21124 known to be exploited?

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

Auth bypass in Ureport Project

CVE-2020-21124

UReport 2.2.9 allows attackers to execute arbitrary code due to a lack of access control to the designer page.

Vulnerability class: Broken Access Control

Published 2021-09-15 · 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: 0.022 (81.7th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 81.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.022 · newest: 0.022 · change: 0.000

Affected products

Ureport Project — versions 2.2.9

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

Public proof-of-concept exploits

p1ay8y3ar/cve_

References

github.com/youseries/ureport/issues/484 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2020-21124?: CVE-2020-21124 is a critical-severity vulnerability in Ureport Project, classified under Incorrect Authorization. CVSS score: 9.8/10. Published 2021-09-15.
How severe is CVE-2020-21124?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-21124 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.