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Fencer Intel
medium 6.9

CVE-2020-8493 json

A stored XSS vulnerability in Kronos Web Time and Attendance (webTA) affects 3.8.x and later 3.x versions before 4.0 via multiple input fie…

published 6y ago modified 4mo ago also EUVD-2020-29359

cvss
6.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
1
Exploit-DB

Summary

A stored XSS vulnerability in Kronos Web Time and Attendance (webTA) affects 3.8.x and later 3.x versions before 4.0 via multiple input fields (Login Message, Banner Message, and Password Instructions) of the com.threeis.webta.H261configMenu servlet via an authenticated administrator.

Patch / fix

  • kronos web_time_and_attendance 4.0

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Timeline

  1. Published
  2. First public exploit (EDB-48001)

Exploit prediction

1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-48001 Kronos WebTA 4.0 - Authenticated Remote Privilege Escalation webapps, 2020-02-05
  • nolanbkennedy.com http://www.nolanbkennedy.com/post/stored-xss-in-kronos-web-time-and-attendance-webta referenced PoC, tagged "exploit" by a source, unverified
  • packetstormsecurity.com http://packetstormsecurity.com/files/156215/Kronos-WebTA-4.0-Privilege-Escalation-Cross-Site-Scripting.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.9 CVSS:3.0/AC:L/AV:N/A:N/C:L/I:H/PR:H/S:C/UI:R
NVD 3.1 4.8 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CNA 3.0 6.9 CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:H/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.