How severe is CVE-2021-28023?

CVE-2021-28023 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-28023 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28023?

CVE-2021-28023 affects Servicetonic. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28023?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2021-28023 published?

CVE-2021-28023 was published on 2021-11-08 and last updated on 2026-06-17.

CVE-2021-28023

CVE-2021-28023 is a critical-severity vulnerability in Servicetonic with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Servicetonic
Published: 2021-11-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2021-28023?: 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 severe is CVE-2021-28023?: CVE-2021-28023 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-28023 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28023?: CVE-2021-28023 affects Servicetonic. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28023?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-28023 published?: CVE-2021-28023 was published on 2021-11-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:servicetonic:servicetonic:*:*:*:*:*:*:*:*

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