What is the CVSS score of CVE-2021-28170?

CVE-2021-28170 has a CVSS 3.1 base score of 5.3 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N. EPSS exploitation probability: 2.1%.

Is there a public PoC exploit available for CVE-2021-28170?

Yes, a public proof-of-concept exploit is available for CVE-2021-28170. Prioritise patching immediately. EPSS: 2.1%.

Is there a patch available for CVE-2021-28170?

Yes, a patch is available for CVE-2021-28170. Update the affected software to the latest version immediately.

Jakarta Expression Language CVE-2021-28170

MEDIUM

Improper Input Validation (CWE-20)

2021-05-26 emo@eclipse.org

Information Disclosure Jakarta Expression Language Quarkus Communications Cloud Native Core Policy Weblogic Server

5.3

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.3 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

May 26, 2021 - 22:15 nvd

MEDIUM 5.3

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

1 maven packages depend on com.sun.el:el-ri (1 direct, 0 indirect)
2,268 maven packages depend on org.glassfish:jakarta.el (101 direct, 2,186 indirect)
746 maven packages depend on org.glassfish:javax.el (51 direct, 701 indirect)

Ecosystem-wide dependent count for version 3.0.4 and other introduced versions.

DescriptionNVD

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.

AnalysisAI

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. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-20. 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 include: Eclipse Jakarta Expression Language, Quarkus, Oracle Communications Cloud Native Core Policy, Oracle Weblogic Server.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.