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Fencer Intel
critical 9.8

CVE-2021-34621 in the critical feed json

ProfilePress 3.0 - 3.1.3 - Unauthenticated Privilege Escalation

published 5y ago modified 4mo ago also EUVD-2021-21271

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
68.9%
EPSS 68.9% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

A vulnerability in the user registration component found in the ~/src/Classes/RegistrationAuth.php file of the ProfilePress WordPress plugin made it possible for users to register on sites as an administrator. This issue affects versions 3.0.0 - 3.1.3. .

Is CVE-2021-34621 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. First public exploit (EDB-50242)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
2y ago

Exploit prediction

68.86% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-50242 WordPress Plugin ProfilePress 3.1.3 - Privilege Escalation (Unauthenticated) webapps, 2021-08-31
  • Nuclei template WordPress ProfilePress 3.0.0-3.1.3 - Admin User Creation Weakness nuclei detection template
  • wordfence.com https://www.wordfence.com/blog/2021/06/easily-exploitable-critical-vulnerabilities-patched-in-profilepress-plugin/ referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/163973/WordPress-ProfilePress-3.1.3-Privilege-Escalation.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • ProfilePress ProfilePress
  • properfraction profilepress

Classification

Weakness
  • CWE-269 Improper Privilege Management
  • CWE-306 Missing Authentication for Critical Functionality
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.