CVE-2021-34429

CRITICALNVD 5.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because EPSS predicts 99% probability of exploitation within the next 30 days (top 0.1% of all CVEs). NVD baseline CVSS 5.3 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss, nvd
Weaponized
9.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 99%
  • Public exploit code is available (Metasploit, epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 99%CVSS: 5.3Exploit: Metasploit · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

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.

CVSS v3
5.3
EG Score
9.0(high)
EG Risk
85(Track)
EG Risk 85/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation99% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
99%
EPSS %ILE
100%
KEV
Not listed

Published

July 15, 2021

Last Modified

November 21, 2024

References (76)

Vendor Advisories for CVE-2021-34429(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatjetty-server2022-01-13redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
jetty9—9.4.39-3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
jetty9—9.4.39-3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
jetty9—9.4.39-3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
jetty9—9.4.39-3—
Maven(1)
PackageVulnerable rangeFixed inDependents
org.eclipse.jetty:jetty-webapp11.0.1, 11.0.2, 11.0.3, 11.0.4, 11.0.511.0.6—

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 2× in last 7d / 12× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-16 14:05 UTCEPSS rescore
  2. 2026-09-16 14:05 UTCEPSS rescore
  3. 2026-09-07 15:58 UTCEPSS rescore
  4. 2026-09-06 13:45 UTCEPSS rescore
  5. 2026-09-06 13:45 UTCEPSS rescore
  6. 2026-09-06 12:30 UTCOSV refresh
  7. 2026-09-05 15:25 UTCEPSS rescore
  8. 2026-08-30 19:14 UTCEPSS rescore
  9. 2026-08-28 21:37 UTCEPSS rescore
  10. 2026-08-26 14:42 UTCEPSS rescore
  11. 2026-08-25 13:46 UTCEPSS rescore
  12. 2026-08-24 14:13 UTCEPSS rescore
  13. 2026-08-19 23:15 UTCOSV refresh
  14. 2026-08-16 02:11 UTCEPSS rescore
  15. 2026-08-16 02:11 UTCEPSS rescore
  16. 2026-08-04 18:18 UTCOSV refresh
  17. 2026-08-03 10:33 UTCEPSS rescore
  18. 2026-08-02 02:24 UTCEPSS rescore
  19. 2026-08-02 02:24 UTCEPSS rescore
  20. 2026-07-23 02:01 UTCEG score recompute
  21. 2026-07-22 22:48 UTCEG score recompute
  22. 2026-07-22 14:06 UTCEPSS rescore
  23. 2026-07-22 14:06 UTCEPSS rescore
  24. 2026-07-18 16:29 UTCOSV refresh
  25. 2026-07-09 19:07 UTCEPSS rescore
Show 20 more
  1. 2026-06-30 23:00 UTCOSV refresh
  2. 2026-06-28 14:05 UTCEPSS rescore
  3. 2026-06-15 17:46 UTCEPSS rescore
  4. 2026-06-13 01:46 UTCOSV refresh
  5. 2026-06-08 14:15 UTCEPSS rescore
  6. 2026-06-08 14:15 UTCEPSS rescore
  7. 2026-06-06 13:46 UTCEPSS rescore
  8. 2026-06-06 13:46 UTCEPSS rescore
  9. 2026-06-06 13:46 UTCEPSS rescore
  10. 2026-06-05 22:45 UTCEPSS rescore
  11. 2026-05-31 00:15 UTCEPSS rescore
  12. 2026-05-31 00:15 UTCEPSS rescore
  13. 2026-05-28 13:43 UTCEPSS rescore
  14. 2026-05-28 13:43 UTCEPSS rescore
  15. 2026-05-26 13:30 UTCEG score recompute
  16. 2026-05-26 13:30 UTCVendor advisory
  17. 2026-05-26 07:17 UTCEPSS rescore
  18. 2026-05-26 07:17 UTCEPSS rescore
  19. 2026-05-26 07:17 UTCEPSS rescore
  20. 2026-05-24 21:12 UTCOSV refresh

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-50478
    First seen Nov 3, 2021

    Eclipse Jetty 11.0.5 - Sensitive File Disclosure

    Open source ↗
  • GitHub PoCColdFusionX/CVE-2021-34429
    First seen Nov 3, 2021

    POC for CVE-2021-34429 - Eclipse Jetty 11.0.5 Sensitive File Disclosure

    Open source ↗
  • Metasploitauxiliary/gather/jetty_web_inf_disclosure✓ verified
    First seen Jul 15, 2021

    Jetty WEB-INF File Disclosure

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-34429.yaml
    First seen Jan 1, 2021

    Eclipse Jetty - Information Disclosure

    Open source ↗

Frequently asked(5)

What is CVE-2021-34429?
CVE-2021-34429 is a critical vulnerability published on July 15, 2021. 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.
When was CVE-2021-34429 disclosed?
CVE-2021-34429 was first published in the National Vulnerability Database on July 15, 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-2021-34429 actively exploited?
CVE-2021-34429 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99% probability of exploitation in the next 30 days, which ranks it in the top 0.1% of all scored CVEs.
What is the CVSS score of CVE-2021-34429?
CVE-2021-34429 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
How do I remediate CVE-2021-34429?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-34429, 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-2021-34429

Explore →

Is Your Infrastructure Affected by CVE-2021-34429?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs