CVE-2021-24647Public exploitNetwork attack vector

Unauthenticated account takeover via trusted social-login fields

Published Nov 8, 2021 · Updated Aug 3, 2024

Authentication bypass in Pie Register before 3.7.1.6 allows remote attackers to access any account through a crafted social-login request. The login handler trusts the social_site flag and attacker-supplied user_id_social_site or log value without verifying the external identity. An exposed Pie Register login page and a known user ID or username are sufficient to create a session with that account's privileges, including administrator access when targeted.

CVSS severity8.1
High
EPSS probability9.83%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Pie Register before 3.7.1.6 allows remote attackers to access any account through a crafted social-login request. The login handler trusts the social_site flag and attacker-supplied user_id_social_site or log value without verifying the external identity. An exposed Pie Register login page and a known user ID or username are sufficient to create a session with that account's privileges, including administrator access when targeted.

The record

CVE
CVE-2021-24647
Published
Nov 8, 2021
Updated
Aug 3, 2024
Vendor
Page Builder Addons
Product
Pie Register
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.1.7.6 <3.1.7.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Page Builder Addons · Pie Registerversion=3.1.7.6 <3.1.7.6

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8NIST NVDAV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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