XPath Injection in Frentix Openolat
CVE-2021-39181
OpenOlat is a web-based learning management system (LMS). Prior to version 15.3.18, 15.5.3, and 16.0.0, using a prepared import XML file (e.g. a course) any class on the Java classpath can be instantiated, including spring AOP bean factories. This can be used to execute code arbitrary code by the attacker. The attack requires an OpenOlat user account with the authoring role. It can not be exploited by unregistered users. The problem is fixed in versions 15.3.18, 15.5.3, and 16.0.0. There are no known workarounds aside from upgrading.
EPSS: 0.019 (77.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Frentix Openolat
- Openolat — versions < 15.3.18, >= 15.4.0, < 15.5.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Permissions Required, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-39181?
- CVE-2021-39181 is a high-severity vulnerability in Frentix Openolat, classified under XML Injection (Blind XPath Injection). CVSS score: 8.8/10. Published 2021-09-01.
- How severe is CVE-2021-39181?
- High severity. CVSS v3 base score is 8.8 out of 10.