CVE-2023-45303
ThingsBoard Server-Side Template Injection
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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).
- Record
CVE-2023-45303- CVSS 3.1
- 8.4 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:R - Weakness
- CWE-74
- Updated
- 2026-11-02
EUVDEUVD-2023-2677
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).
- Record
EUVD-2023-2677- CVSS 3.1
- 8.4 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:R - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6pgr-j9v4-xfvv
ThingsBoard Server-Side Template Injection
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.
- Record
GHSA-6pgr-j9v4-xfvv- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-74
- Updated
- 2026-11-02
NVD
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).
- Record
CVE-2023-45303- CVSS 3.1
- 8.4 High
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H - CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-74
- Updated
- 2026-11-02
OSV
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).
- Record
CVE-2023-45303- CVSS 3.1
- 8.4 High
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:H/S:C/UI:R - Updated
- 2026-11-02
OSVGHSA-6pgr-j9v4-xfvv
ThingsBoard Server-Side Template Injection
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.
- Record
GHSA-6pgr-j9v4-xfvv- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-74
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.thingsboard:thingsboardMaven |
before 3.5 | 3.5 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-45303 is a high vulnerability (CVSS 8.4) in Thingsboard, published October 6, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.05%, the 64th percentile. Fixed in org.thingsboard:thingsboard 3.5.