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Fencer Vulns
medium 6.1

CVE-2020-25925 json

Cross Site Scripting (XSS) in Webmail Calender in IceWarp WebClient 10.3.5 allows remote attackers to inject arbitrary web script or HTML v…

published 2021-07-07 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18555

cvss
6.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits
0
none known

Summary

Cross Site Scripting (XSS) in Webmail Calender in IceWarp WebClient 10.3.5 allows remote attackers to inject arbitrary web script or HTML via the "p4" field.

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • ashketchum.medium.com https://ashketchum.medium.com/cross-site-scripting-xss-in-webmail-calender-in-icewarp-webclient-cve-2020-25925-67e1cbc40bd9 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

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

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.