CVE-2021-34429
MediumExploitedPublic exploitFor Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints.
Published Jun 20, 2022 · Updated Sep 10, 2026 · Also known as DEBIAN-CVE-2021-34429, GHSA-vjv5-gp2w-65vm, SUSE-SU-2021:2838-1, TR-21-0793, UBUNTU-CVE-2021-34429
Key Facts
Patch immediately- CVE-2021-34429 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting Jetty (Eclipse), Element Plug-In For Vcenter Server (Netapp), E-Series Santricity OS Controller (Netapp) and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Jan 12, 2023. Public exploit code is available.
- EPSS estimates a 99% probability of exploitation in the next 30 days.
- Fixed versions are available, including Jetty 9.4.43, Jetty unspecified, jetty-annotations 9.4.43-1.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
99%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2021-34429 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. This is a variation of the vulnerability reported in CVE-2021-28164/GHSA-v7ff-8wcx-gmc5.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jan 12, 2023 | 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
109 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| JettyEclipse | >= 9.4.37 | 9.4.43 |
| Element Plug-In For Vcenter ServerNetapp | See advisory | n/a |
| E-Series Santricity OS ControllerNetapp | See advisory | 11.70.1 |
| E-Series Santricity Web ServicesNetapp | See advisory | n/a |
| Hci Management NodeNetapp | See advisory | n/a |
Patched Releases
Jetty
9.4.43, unspecified
jetty-annotations
9.4.43-1.2, 9.4.43-3.12.2
jetty-ant
9.4.43-1.2
jetty-cdi
9.4.43-1.2
jetty-client
9.4.43-1.2, 9.4.43-3.12.2
jetty-continuation
9.4.43-1.2, 9.4.43-3.12.2
jetty-deploy
9.4.43-1.2
jetty-fcgi
9.4.43-1.2
jetty-http
9.4.43-1.2, 9.4.43-3.12.2
jetty-http-spi
9.4.43-1.2
jetty-io
9.4.43-1.2, 9.4.43-3.12.2
jetty-jaas
9.4.43-1.2, 9.4.43-3.12.2
jetty-javax-websocket-client-impl
9.4.43-3.12.2
jetty-javax-websocket-server-impl
9.4.43-3.12.2
jetty-jmx
9.4.43-1.2, 9.4.43-3.12.2
jetty-jndi
9.4.43-1.2, 9.4.43-3.12.2
jetty-jsp
9.4.43-1.2, 9.4.43-3.12.2
jetty-minimal
9.4.43-3.12.2
jetty-minimal-javadoc
9.4.43-1.2, 9.4.43-3.12.2
jetty-openid
9.4.43-1.2, 9.4.43-3.12.2
jetty-plus
9.4.43-1.2, 9.4.43-3.12.2
jetty-proxy
9.4.43-1.2, 9.4.43-3.12.2
jetty-quickstart
9.4.43-1.2
jetty-rewrite
9.4.43-1.2
jetty-security
9.4.43-1.2, 9.4.43-3.12.2
Timeline
Publicly disclosed
Jun 20, 2022
Added to Industry KEV feed
Jan 12, 2023
Last updated
Sep 10, 2026
Weakness Type
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- CWE-551 Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
- CWE-863 Incorrect Authorization
References
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35550
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23773
- advisoryRHSA-2021:3700
- advisoryRHSA-2022:0138
- advisoryhttps://bugzilla.suse.com/1188438
FAQ
Common Questions.
For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints.
Affected: Jetty (Eclipse) versions >= 9.4.37; Element Plug-In For Vcenter Server (Netapp); E-Series Santricity OS Controller (Netapp), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jan 12, 2023.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Jetty 9.4.43, Jetty unspecified, jetty-annotations 9.4.43-1.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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