CVE-2021-29842

MEDIUMNVD 5.35.3—

5.3

IBM WebSphere Application Server 7.0, 8.0, 8.5, 9.0 and Liberty 17.0.0.3 through 21.0.0.9 could allow a remote user to enumerate usernames due to a difference of responses from valid and invalid login attempts. IBM X-Force ID: 205202.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 59.1%
KEV: Not listed

Published

September 16, 2021

Last Modified

November 21, 2024

References (4)

psirt@ushttps://exchange.xforce.ibmcloud.com/vulnerabilities/205202
psirt@ushttps://www.ibm.com/support/pages/node/6489485
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/205202
af854a3a-2127-422b-91ae-364da2661108https://www.ibm.com/support/pages/node/6489485

Weakness Classification(1)

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

CWE-307Improper Restriction of Excessive Authentication Attempts

Data Freshness Timeline

(refreshed 11× 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
2026-06-02 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
2026-05-29 13:42 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
2026-05-26 13:42 UTCepss_batch
2026-05-26 10:17 UTCEG score recompute
2026-05-26 10:17 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 04:02 UTCOSV refresh

Frequently asked(5)

What is CVE-2021-29842?

CVE-2021-29842 is a medium vulnerability published on September 16, 2021. IBM WebSphere Application Server 7.0, 8.0, 8.5, 9.0 and Liberty 17.0.0.3 through 21.0.0.9 could allow a remote user to enumerate usernames due to a difference of responses from valid and invalid login attempts. IBM X-Force ID: 205202.

When was CVE-2021-29842 disclosed?

CVE-2021-29842 was first published in the National Vulnerability Database on September 16, 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-2021-29842 actively exploited?

CVE-2021-29842 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-29842?

CVE-2021-29842 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2021-29842?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-29842, 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

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CVE-2021-29842

📅 Published

🔄 Last Modified

🔗 References (4)