Home/CVE/In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid E
CVE

CVE-2021-28170

In the Jakarta Expression Language implementation 3.0.3 and earlier, a bug in the ELParserTokenManager enables invalid E

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.

MEDIUM · CVSS 5.3 EPSS 0.00115
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')
▤

Affected Products & Versions

4
eclipse jakarta expression language<= 3.0.3
quarkus< 2.3.0
oracle communications cloud native core policyall versions
oracle weblogic serverall versions
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven com.sun.el:el-ri MODERATE fixed in 3.0.4
Maven org.glassfish:jakarta.el MODERATE fixed in 3.0.4
Maven org.glassfish:javax.el MODERATE
⚠

Public Exploits & PoCs

2
pocgithub.com · issues/155github.com
pocsecuritylab.github.com · GHSL-2020-021-jakarta-elsecuritylab.github.com
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · emo@eclipse.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 May 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
⚑

Vendor Advisories

15
rhsaRHSA-2025:9582Moderate
rhsaRHSA-2022:1029Important
rhsaRHSA-2022:1013Moderate
rhsaRHSA-2022:0589Moderate
rhsaRHSA-2021:5134Critical
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
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