CVE-2020-35604: An XXE attack can occur in Kronos WebTA 5.0.4 when SAML is used.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2020-35604 is a critical-severity flaw (CVSS 9.8) affecting web time and attendance. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An XXE attack can occur in Kronos WebTA 5.0.4 when SAML is used.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.7% (top 23%)
CISA exploited list	No
Weakness	CWE-611
Published	2020-12-21
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: kronos

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-12-21 19:15 UTCPublished CVE record published
2026-06-17 03:14 UTCUpdated Record last modified

kronos web time and attendance DOWNGRADE

Affected: 5.0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.4

1. Check installed version

apt-cache policy web-time-and-attendance || rpm -q web-time-and-attendance || web-time-and-attendance --version

2. No fixed release: DOWNGRADE to a release before 5.0.4 (Debian / Ubuntu)

apt-cache madison web-time-and-attendance sudo apt install web-time-and-attendance=<VERSION_BEFORE_5.0.4> sudo apt-mark hold web-time-and-attendance

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list web-time-and-attendance sudo dnf downgrade web-time-and-attendance-<VERSION_BEFORE_5.0.4> sudo dnf versionlock add web-time-and-attendance

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-35604?

web time and attendance: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-35604 being exploited?

CVE-2020-35604 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-35604 affect?

CVE-2020-35604 affects web time and attendance. Severity is critical (CVSS 9.8). An XXE attack can occur in Kronos WebTA 5.0.4 when SAML is used.

How urgent is CVE-2020-35604?

Priority 63/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2020-8496 MEDIUM 4.8 UPGRADE In Kronos Web Time and Attendance (webTA) 4.1.x and later 4.x versions before 5.0, there is a Stored XSS vulne
CVE-2020-8495 HIGH 7.5 UPGRADE In Kronos Web Time and Attendance (webTA) 3.8.x and later 3.x versions before 4.0, the com.threeis.webta.H491d
CVE-2020-8494 HIGH 8.8 UPGRADE In Kronos Web Time and Attendance (webTA) 3.8.x and later 3.x versions before 4.0, the com.threeis.webta.H402e
CVE-2020-8493 MEDIUM 4.8 UPGRADE A stored XSS vulnerability in Kronos Web Time and Attendance (webTA) affects 3.8.x and later 3.x versions befo
CVE-2020-14982 MEDIUM 6.5 UPGRADE A Blind SQL Injection vulnerability in Kronos WebTA 3.8.x and later before 4.0 (affecting the com.threeis.webt

References

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