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Fencer Intel
medium 5.4

CVE-2021-42943 json

Stored cross-site scripting (XSS) in admin/usermanager.php over IPPlan v4.92b allows remote attackers to inject arbitrary web script or HTM…

published 4y ago modified 4mo ago also EUVD-2021-29898

cvss
5.4
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

Stored cross-site scripting (XSS) in admin/usermanager.php over IPPlan v4.92b allows remote attackers to inject arbitrary web script or HTML via the userid parameter.

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Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • devbrain.com.br https://devbrain.com.br/index.php/2022/05/16/cve-2021-42943/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness
  • CWE-79 Improper Neutralization of Input During Web Page Generation

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.