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Fencer Vulns
high 8.8

CVE-2021-25082 json

Popup Builder < 4.0.7 - LFI to RCE

published 2022-02-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11994

cvss
8.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.2%
EPSS 5.2% chance of exploitation in 30 days, percentile 92%
public exploits
0
none known, plus a Nuclei check

Summary

The Popup Builder WordPress plugin before 4.0.7 does not validate and sanitise the sgpb_type parameter before using it in a require statement, leading to a Local File Inclusion issue. Furthermore, since the beginning of the string can be controlled, the issue can lead to RCE vulnerability via wrappers such as PHAR

Patch / fix

  • sygnoos popup_builder 4.0.7

Exploit prediction

5.23% chance of exploitation in the next 30 days, higher than 92% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template WordPress Popup Builder < 4.0.7 - Remote Code Execution nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/0f90f10c-4b0a-46da-ac1f-aa6a03312132 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Unknown Popup Builder – Create highly converting, mobile friendly marketing popups.

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
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.