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Fencer Vulns
high 8.1

CVE-2021-24647 json

Pie Register < 3.7.1.6 - Unauthenticated Arbitrary Login

published 2021-11-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11559

cvss
8.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.8%
EPSS 9.8% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known, plus a Nuclei check

Summary

The Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes WordPress plugin before 3.1.7.6 has a flaw in the social login implementation, allowing unauthenticated attacker to login as any user on the site by only knowing their user ID or username

Patch / fix

  • genetechsolutions pie_register 3.7.1.6

Exploit prediction

9.83% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Pie Register < 3.7.1.6 - Unauthenticated Arbitrary Login nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/40d347b1-b86e-477d-b4c6-da105935ce37 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • Unknown Registration Forms – User profile, Content Restriction, Spam Protection, Payment Gateways, Invitation Codes

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns 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.