CVE-2021-31779

MEDIUMNVD 6.46.4—

6.4

The yoast_seo (aka Yoast SEO) extension before 7.2.1 for TYPO3 allows SSRF via a backend user account.

CVSS v3: 6.4
EG Score: 6.4(medium)
EPSS: 34.6%
KEV: Not listed

Published

April 28, 2021

Last Modified

November 21, 2024

References (2)

cve@mitrehttps://typo3.org/security/advisory/typo3-ext-sa-2021-006
af854a3a-2127-422b-91ae-364da2661108https://typo3.org/security/advisory/typo3-ext-sa-2021-006

Affected Packages

(1 across 1 ecosystem)

Packagist(1)

Package	Vulnerable range	Fixed in	Dependents
yoast-seo-for-typo3/yoast_seo	7.1.0 ... v7.0.7 (45 versions)	7.2.1	—

Weakness Classification(1)

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

CWE-918Server-Side Request Forgery (SSRF)

Data Freshness Timeline

(refreshed 6× in last 7d / 6× 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.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 17:21 UTCEG score recompute
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-31779?

CVE-2021-31779 is a medium vulnerability published on April 28, 2021. The yoast_seo (aka Yoast SEO) extension before 7.2.1 for TYPO3 allows SSRF via a backend user account.

When was CVE-2021-31779 disclosed?

CVE-2021-31779 was first published in the National Vulnerability Database on April 28, 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-2021-31779 actively exploited?

CVE-2021-31779 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31779?

CVE-2021-31779 has a CVSS v3 base score of 6.4 (NVD).

How do I remediate CVE-2021-31779?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31779, 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-2021-31779

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Is Your Infrastructure Affected by CVE-2021-31779?

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