CVE-2021-26544

Name: CVE-2021-26544
Creator: NVD / NIST
Published: 2021-02-20T09:15:12.377+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 2.82%

Last modified Jun 17, 2026

CVE-2021-26544 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Livy server version 0.7.0-incubating (only) is vulnerable to a cross site scripting issue in the session name. A malicious user could use this flaw to access logs and results of other users' sessions and run jobs with their privileges. EPSS estimates a 2.82% chance of exploitation in the next 30 days.

Description

Livy server version 0.7.0-incubating (only) is vulnerable to a cross site scripting issue in the session name. A malicious user could use this flaw to access logs and results of other users' sessions and run jobs with their privileges. This issue is fixed in Livy 0.7.1-incubating.

Metrics

CVSS 3.1

5.4/10

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

EPSS Probability

2.82%

84.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Livy	0.7.0-incubating

References

http://www.openwall.com/lists/oss-security/2021/02/20/1Mailing List, Patch, Third Party Advisory
https://github.com/apache/incubator-livy/commit/4d8a912699683b973eee76d4e91447d769a0cb0dPatch, Third Party Advisory
https://lists.apache.org/thread.html/r2db14e7fd1e5ec2519e8828d43529bad623d75698cc7918af3a3f3ed%40%3Cuser.livy.apache.org%3EPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/02/20/1Mailing List, Patch, Third Party Advisory
https://github.com/apache/incubator-livy/commit/4d8a912699683b973eee76d4e91447d769a0cb0dPatch, Third Party Advisory
https://lists.apache.org/thread.html/r2db14e7fd1e5ec2519e8828d43529bad623d75698cc7918af3a3f3ed%40%3Cuser.livy.apache.org%3EPatch, Vendor Advisory

Timeline

Published: Feb 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26544?

How severe is CVE-2021-26544?

CVE-2021-26544 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 2.82% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26544?

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-2021-26544?

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

Scan your code now

Source: NVD / NIST