CVE-2021-24731: The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Code

Q: How do I fix CVE-2021-24731?

pie register: upgrade to 3.7.1.6. Exact commands for each OS are on this page.

Q: Is CVE-2021-24731 being exploited?

CVE-2021-24731 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-24731 affect?

CVE-2021-24731 affects pie register. Severity is critical (CVSS 9.8). The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes WordPress plugin before 3.7.1.6 does not properly escape user data before using it in a SQL statement in the wp-json/pie/v1/logi

Q: How urgent is CVE-2021-24731?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-24731 is a critical-severity flaw (CVSS 9.8) affecting pie register. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes WordPress plugin before 3.7.1.6 does not properly escape user data before using it in a SQL statement in the wp-json/pie/v1/login REST API endpoint, leading to an SQL injection.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.4% (top 6%)
CISA exploited list	No
Weakness	CWE-89
Published	2021-11-08
Last modified	2026-06-17

Publisher (CNA): WPScan · Vendor: genetechsolutions

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-11-08 18:15 UTCPublished CVE record published
2026-06-17 03:40 UTCUpdated Record last modified

genetechsolutions pie register UPGRADE

Affected: < 3.7.1.6

Fixed in: 3.7.1.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pie-register || rpm -q pie-register || pie-register --version

2. UPGRADE to 3.7.1.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pie-register

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pie-register

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Pie Register < 3.7.1.6 - SQL Injection

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-24731?

pie register: upgrade to 3.7.1.6. Exact commands for each OS are on this page.

Is CVE-2021-24731 being exploited?

CVE-2021-24731 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-24731 affect?

CVE-2021-24731 affects pie register. Severity is critical (CVSS 9.8). The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes WordPress plugin before 3.7.1.6 does not properly escape user data before using it in a SQL statement in the wp-json/pie/v1/logi

How urgent is CVE-2021-24731?

Priority 68/100. Critical severity; EPSS top 6%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities

Related CVEs

CVE-2024-27957 CRITICAL 10.0 UPGRADE Unrestricted Upload of File with Dangerous Type vulnerability in Pie Register.This issue affects Pie Register:
CVE-2024-13818 MEDIUM 5.3 UPGRADE The Registration Forms – User Registration Forms, Invitation-Based Registrations, Front-end User Profile, Logi
CVE-2023-0552 MEDIUM 5.4 UPGRADE The Registration Forms WordPress plugin before 3.8.2.3 does not properly validate the redirection URL when log
CVE-2022-4024 MEDIUM 6.5 UPGRADE The Registration Forms WordPress plugin before 3.8.1.3 does not have authorisation and CSRF when deleting user
CVE-2021-24647 HIGH 8.1 UPGRADE The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Code

References

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