CVE-2021-34428

Logout bypass via aborted session cleanup

Published Jun 22, 2021 · Updated Aug 4, 2024

Insufficient session expiration in Eclipse Jetty before 9.4.41, 10.0.3, or 11.0.3 allows attackers to retain logged-in access. An exception from SessionListener.sessionDestroyed aborts removal of the session ID from the session ID manager, leaving the clustered session valid. Exploitation requires clustered sessions, multiple contexts, a listener that throws, and later physical access to the same shared computer.

CVSS severity2.9
Low
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient session expiration in Eclipse Jetty before 9.4.41, 10.0.3, or 11.0.3 allows attackers to retain logged-in access. An exception from SessionListener.sessionDestroyed aborts removal of the session ID from the session ID manager, leaving the clustered session valid. Exploitation requires clustered sessions, multiple contexts, a listener that throws, and later physical access to the same shared computer.

The record

CVE
CVE-2021-34428
Published
Jun 22, 2021
Updated
Aug 4, 2024
Vendor
The Eclipse Foundation
Product
Eclipse Jetty
Classifications
CWE-613
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.0 <unspecified
  2. Affected versionversion=11.0.0 <unspecified
  3. Affected versionversion=9.0.0 <unspecified
  4. Affected versionversion=unspecified <=10.0.2
  5. Affected versionversion=unspecified <=11.0.2
  6. Affected versionversion=unspecified <=9.4.40

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse Jettyversion=10.0.0 <unspecified; version=11.0.0 <unspecified; version=9.0.0 <unspecified; version=unspecified <=10.0.2; version=unspecified <=11.0.2; version=unspecified <=9.4.40

Published CVSS scores

2.9The Eclipse FoundationCVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
3.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:N
3.5NIST NVDCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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