CVE-2021-28170

Name: CVE-2021-28170
Creator: NVD / NIST
Published: 2021-05-26T22:15:07.98+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 2.13%

Last modified Jun 17, 2026

CVE-2021-28170 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.. EPSS estimates a 2.13% chance of exploitation in the next 30 days.

Description

In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

2.13%

79.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Eclipse	Jakarta Expression Language	<= 3.0.3
Quarkus	Quarkus	< 2.3.0
Oracle	Communications Cloud Native Core Policy	1.14.0
Oracle	Weblogic Server	14.1.1.0.0

References

https://github.com/eclipse-ee4j/el-ri/issues/155Exploit, Issue Tracking, Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-021-jakarta-el/Exploit, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://github.com/eclipse-ee4j/el-ri/issues/155Exploit, Issue Tracking, Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2020-021-jakarta-el/Exploit, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory

Timeline

Published: May 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-28170?

In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid EL expressions to be evaluated as if they were valid.

How severe is CVE-2021-28170?

CVE-2021-28170 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 2.13% probability of exploitation in the next 30 days.

How do I fix CVE-2021-28170?

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-2021-28170?

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

Scan your code now

Source: NVD / NIST