9.8

CVE-2021-4073: metagauss registrationmagic Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 14-12-2021Last modified 14-02-2025
Open JSON

Vulnerability summary

CVE-2021-4073 is a critical (CVSS 9.8) Improper Authentication vulnerability in metagauss registrationmagic. EPSS estimates a 6.84% chance of exploitation in the next 30 days, higher than 93.9% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 5.0.1.8.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
6.84%
0%100%
Low · -0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 14-12-2021
    PublishedVulnerability first disclosed.
  2. 14-02-2025
    Last modifiedVulnerability information updated.

Description

The RegistrationMagic WordPress plugin made it possible for unauthenticated users to log in as any site user, including administrators, if they knew a valid username on the site due to missing identity validation in the social login function social_login_using_email() of the plugin. This affects versions equal to, and less than, 5.0.1.7.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

6.84%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

-0.16 pp

From 7.00% on 18-09-2026

18-09-202618-10-2026
EPSS score
6.84%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (wordfence.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Metagauss1 product
Registrationmagic1 product
Wordpress1 product
  • custom-registration-form-builder-with-submission-manager≤ 5.0.1.7 (fixed in 5.0.1.8)

3 vendors · 3 products

References

4 links