What’s Vulnerable › Vulnerabilities

CVE-2021-28170

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-26 · updated 2026-06-17
• Weakness: CWE-20

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.

Affected products

• eclipse Jakarta Expression Language: through 3.0.3
• Oracle Communications Cloud Native Core Policy: 1.14.0
• Oracle WebLogic Server: 14.1.1.0.0
• quarkusio quarkus: before 2.3.0 — fixed in 2.3.0

How to fix

Upgrade to a fixed version: quarkusio quarkus 2.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/eclipse-ee4j/el-ri/issues/155
• https://securitylab.github.com/advisories/GHSL-2020-021-jakarta-el/
• https://www.oracle.com/security-alerts/cpuapr2022.html
• https://github.com/eclipse-ee4j/el-ri/issues/155
• https://securitylab.github.com/advisories/GHSL-2020-021-jakarta-el/
• https://www.oracle.com/security-alerts/cpuapr2022.html

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