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CVE-2019-8341

9.8 · CRITICAL

An issue was discovered in Jinja2 2.10.

Published Feb 15, 2019CWE-94EPSS 43.87%

Overview

CVE-2019-8341 is a critical-severity vulnerability. It was published on February 15, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in Jinja2 2.10. The from_string function is prone to Server Side Template Injection (SSTI) where it takes the "source" parameter as a template object, renders it, and then returns it. The attacker can exploit it with {{INJECTION COMMANDS}} in a URI. NOTE: The maintainer and multiple third parties believe that this vulnerability isn't valid because users shouldn't use untrusted templates without sandboxing

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2019-05/msg00030.htmlReflists.opensuse.org/opensuse-security-announce/2019-06/msg00064.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1677653Refbugzilla.suse.com/show_bug.cgi?id=1125815GitHubgithub.com/JameelNabbo/Jinja2-Code-executionRefwww.exploit-db.com/exploits/46386/Reflists.opensuse.org/opensuse-security-announce/2019-05/msg00030.htmlReflists.opensuse.org/opensuse-security-announce/2019-06/msg00064.htmlRefbugzilla.redhat.com/show_bug.cgi?id=1677653Refbugzilla.suse.com/show_bug.cgi?id=1125815

How CyberStrike helps

Frequently asked questions

What is CVE-2019-8341?

CVE-2019-8341 is a critical-severity vulnerability. It was published on February 15, 2019 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2019-8341?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-8341?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-8341?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-8341 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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