CVE-2021-28023: Arbitrary file upload in Service import feature in ServiceTonic Helpdesk software version < 9.0.35937 allows a

Q: How do I fix CVE-2021-28023?

servicetonic: upgrade to 9.0.035937. Exact commands for each OS are on this page.

Q: Is CVE-2021-28023 being exploited?

CVE-2021-28023 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-28023 affect?

CVE-2021-28023 affects servicetonic. Severity is critical (CVSS 9.8). Arbitrary file upload in Service import feature in ServiceTonic Helpdesk software version < 9.0.35937 allows a malicious user to execute JSP code by uploading a zip that extracts files in relative paths.

Q: How urgent is CVE-2021-28023?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-28023 is a critical-severity flaw (CVSS 9.8) affecting servicetonic. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Arbitrary file upload in Service import feature in ServiceTonic Helpdesk software version < 9.0.35937 allows a malicious user to execute JSP code by uploading a zip that extracts files in relative paths.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-434
Published	2021-11-08
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: servicetonic

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

Am I affected?

Timeline

2021-11-08 15:15 UTCPublished CVE record published
2026-06-17 03:45 UTCUpdated Record last modified

servicetonic servicetonic UPGRADE

Affected: < 9.0.035937

Fixed in: 9.0.035937

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy servicetonic || rpm -q servicetonic || servicetonic --version

2. UPGRADE to 9.0.035937 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade servicetonic

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade servicetonic

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2021-28023?

servicetonic: upgrade to 9.0.035937. Exact commands for each OS are on this page.

Is CVE-2021-28023 being exploited?

CVE-2021-28023 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-2021-28023 affect?

CVE-2021-28023 affects servicetonic. Severity is critical (CVSS 9.8). Arbitrary file upload in Service import feature in ServiceTonic Helpdesk software version < 9.0.35937 allows a malicious user to execute JSP code by uploading a zip that extracts files in relative paths.

How urgent is CVE-2021-28023?

Priority 62/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2021-28024 CRITICAL 9.8 UPGRADE Unauthorized system access in the login form in ServiceTonic Helpdesk software version < 9.0.35937 allows atta
CVE-2021-28022 HIGH 7.5 UPGRADE Blind SQL injection in the login form in ServiceTonic Helpdesk software < 9.0.35937 allows attacker to exfiltr

References

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