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CVE-2021-28170

Status: ModifiedMedium (5.3)—

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.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (4)

Eclipse — Jakarta Expression LanguageOracle — Communications Cloud Native Core PolicyOracle — Weblogic ServerQuarkus — Quarkus

CWEs

References

Raw JSON (NVD)

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  "id": "CVE-2021-28170",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
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  "published": "2021-05-26T22:15:07.980",
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      "description": [
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      "description": [
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      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "En la implementación de Jakarta Expression Language versiones 3.0.3 y anteriores, un bug en la función ELParserTokenManager permite que las expresiones EL no válidas sean evaluadas como si fueran válidas"
    }
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  "lastModified": "2026-06-17T03:45:56.970",
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