CVE-2021-23388

MEDIUMNVD 5.35.3—

5.3

The package forms before 1.2.1, from 1.3.0 and before 1.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via email validation.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 59.2%
KEV: Not listed

Published

June 1, 2021

Last Modified

November 21, 2024

References (6)

report@snykhttps://github.com/caolan/forms/pull/214
report@snykhttps://github.com/caolan/forms/pull/214/commits/d4bd5b5febfe49c1f585f162e04ec810f8dc47a0
report@snykhttps://snyk.io/vuln/SNYK-JS-FORMS-1296389
af854a3a-2127-422b-91ae-364da2661108https://github.com/caolan/forms/pull/214
af854a3a-2127-422b-91ae-364da2661108https://github.com/caolan/forms/pull/214/commits/d4bd5b5febfe49c1f585f162e04ec810f8dc47a0
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-FORMS-1296389

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
forms	—	1.3.2	—

Data Freshness Timeline

(refreshed 11× in last 7d / 18× 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
2026-06-01 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
2026-05-31 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
2026-05-26 15:49 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-23388?

CVE-2021-23388 is a medium vulnerability published on June 1, 2021. The package forms before 1.2.1, from 1.3.0 and before 1.3.2 are vulnerable to Regular Expression Denial of Service (ReDoS) via email validation.

When was CVE-2021-23388 disclosed?

CVE-2021-23388 was first published in the National Vulnerability Database on June 1, 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-2021-23388 actively exploited?

CVE-2021-23388 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 59.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-23388?

CVE-2021-23388 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2021-23388?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23388, 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-2021-23388

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CVE-2021-23388

📅 Published

🔄 Last Modified

🔗 References (6)