CVE-2021-34427
CriticalExploitedIn 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.
Published Jun 25, 2021 · Updated Aug 27, 2026
Key Facts
Patch immediately- CVE-2021-34427 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Business Intelligence And Reporting Tools (Eclipse), Eclipse BIRT.
- It is exploited in the wild, listed in Industry KEV feed since Dec 16, 2025. No public exploit code is known.
- EPSS estimates a 58% probability of exploitation in the next 30 days.
- Fixed versions are available, including Business Intelligence And Reporting Tools <=4.8.0, Business Intelligence And Reporting Tools 4.8.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
58%
Higher than 99.0% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
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Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Dec 16, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Business Intelligence And Reporting ToolsEclipse | See advisory | 4.8.0 |
| Eclipse BIRT | >= unspecified | n/a |
Patched Releases
Business Intelligence And Reporting Tools
<=4.8.0
Timeline
Publicly disclosed
Jun 25, 2021
Added to Industry KEV feed
Dec 16, 2025
Last updated
Aug 27, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- patchhttps://bugs.eclipse.org/bugs/show_bug.cgi?id=538142
- exploithttp://packetstormsecurity.com/files/170326/Eclipse-Business-Intelligence-Reporting-Tool-4.11.0-Remote-Code-Execution.html
- exploitVulnCheck exploitation report
- exploit20221220 SEC Consult SA-20221216-0 :: Remote code execution bypass in Eclipse Business Intelligence Reporting Tool (BiRT)
FAQ
Common Questions.
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.
Affected: Business Intelligence And Reporting Tools (Eclipse); Eclipse BIRT versions >= unspecified. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Dec 16, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Business Intelligence And Reporting Tools <=4.8.0, Business Intelligence And Reporting Tools 4.8.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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