How severe is CVE-2023-45303?

CVE-2023-45303 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-45303 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45303?

CVE-2023-45303 affects Thingsboard. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-45303?

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

When was CVE-2023-45303 published?

CVE-2023-45303 was published on 2023-10-06 and last updated on 2026-06-17.

CVE-2023-45303

CVE-2023-45303 is a high-severity vulnerability in Thingsboard with a CVSS 3.x base score of 8.4. 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-74.

Key facts

Severity: High (CVSS 3.x base score 8.4)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Thingsboard
Published: 2023-10-06
Last modified: 2026-06-17

Description

ThingsBoard before 3.5 allows Server-Side Template Injection if users are allowed to modify an email template, because Apache FreeMarker supports freemarker.template.utility.Execute (for content sent to the /api/admin/settings endpoint).

Frequently asked questions

What is CVE-2023-45303?: ThingsBoard before 3.5 allows Server-Side Template Injection if users are allowed to modify an email template, because Apache FreeMarker supports freemarker.template.utility.Execute (for content sent to the /api/admin/settings endpoint).
How severe is CVE-2023-45303?: CVE-2023-45303 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-45303 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-45303?: CVE-2023-45303 affects Thingsboard. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-45303?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-45303 published?: CVE-2023-45303 was published on 2023-10-06 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:thingsboard:thingsboard:*:*:*:*:*:*:*:*

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