CVE-2021-34427

CRITICALNVD 9.89.8—Elevated

9.8

In Eclipse BIRT versions 4.8.0 and earlier, an attacker can use query parameters to create a JSP file which is accessible from remote (current BIRT viewer dir) to inject JSP code into the running instance.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 98.6%
KEV: Not listed

Published

June 25, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 26, 2026

🔬 Proof of concept available. No patch confirmed yet.

generic

538142 – (CVE-2021-34427) Security bug - RCE in BIRT viewer example

https://bugs.eclipse.org/bugs/show_bug.cgi?id=538142

generic🟡 PoC Available

Full Disclosure: SEC Consult SA-20221216-0 :: Remote code execution bypass in Eclipse Business Intelligence Reporting Tool (BiRT)

http://seclists.org/fulldisclosure/2022/Dec/30

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 14:25 UTCEG score recompute
2026-05-26 14:25 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Nucleihttp/cves/2021/CVE-2021-34427.yaml
First seen Jan 1, 2021
Eclipse BIRT Viewer - Remote Code Execution
Open source ↗

Frequently asked(5)

What is CVE-2021-34427?

CVE-2021-34427 is a critical vulnerability published on June 25, 2021. In Eclipse BIRT versions 4.8.0 and earlier, an attacker can use query parameters to create a JSP file which is accessible from remote (current BIRT viewer dir) to inject JSP code into the running instance.

When was CVE-2021-34427 disclosed?

CVE-2021-34427 was first published in the National Vulnerability Database on June 25, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-34427 actively exploited?

CVE-2021-34427 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-34427?

CVE-2021-34427 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2021-34427?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-34427, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-34427

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CVE-2021-34427

📅 Published

🔄 Last Modified

📋 Advisory Details (2)