CVE-2019-19999

Name: CVE-2019-19999
Creator: NVD / NIST
Published: 2019-12-26T04:15:10.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2019-19999 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. Halo before 1.2.0-beta.1 allows Server Side Template Injection (SSTI) because TemplateClassResolver.SAFER_RESOLVER is not used in the FreeMarker configuration.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

Description

Halo before 1.2.0-beta.1 allows Server Side Template Injection (SSTI) because TemplateClassResolver.SAFER_RESOLVER is not used in the FreeMarker configuration.

Metrics

CVSS 3.1

7.2/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.51%

71.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-918

Affected Software

Vendor	Product	Versions	Update
Halo	Halo	<= 1.1.1	—
Halo	Halo	1.1.3	Beta1
Halo	Halo	1.2.0	Beta1

References

https://github.com/halo-dev/halo/compare/v1.1.3-beta.2...v1.2.0-beta.1Patch, Third Party Advisory
https://github.com/halo-dev/halo/issues/419Exploit, Third Party Advisory
https://github.com/halo-dev/halo/issues/440Exploit, Third Party Advisory
https://github.com/halo-dev/halo/compare/v1.1.3-beta.2...v1.2.0-beta.1Patch, Third Party Advisory
https://github.com/halo-dev/halo/issues/419Exploit, Third Party Advisory
https://github.com/halo-dev/halo/issues/440Exploit, Third Party Advisory

Timeline

Published: Dec 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19999?

Halo before 1.2.0-beta.1 allows Server Side Template Injection (SSTI) because TemplateClassResolver.SAFER_RESOLVER is not used in the FreeMarker configuration.

How severe is CVE-2019-19999?

CVE-2019-19999 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19999?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19999?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST