CVE-2020-11066

HIGHNVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 33% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.7Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, calling unserialize() on malicious user-submitted content can lead to modification of dynamically-determined object attributes and result in triggering deletion of an arbitrary directory in the file system, if it is writable for the web server. It can also trigger message submission via email using the identity of the web site (mail relay). Another insecure deserialization vulnerability is required to actually exploit mentioned aspects. This has been fixed in 9.5.17 and 10.4.2.

CVSS v3
8.7
EG Score
8.7(medium)
EPSS
71.1%
KEV
Not listed

Published

May 14, 2020

Last Modified

November 21, 2024

References (2)

Affected Packages

(2 across 1 ecosystem)
Packagist(2)
PackageVulnerable rangeFixed inDependents
typo3/cmsv9.0.0 ... v9.5.9 (26 versions)9.5.17—
typo3/cms-corev10.0.0 ... v10.4.1 (8 versions)10.4.2—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 43× 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. 2026-07-22 14:05 UTCEPSS rescore
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  7. 2026-07-19 12:54 UTCOSV refresh
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  1. 2026-07-04 06:28 UTCEPSS rescore
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  36. 2026-06-14 02:43 UTCOSV refresh
  37. 2026-06-13 22:58 UTCEPSS rescore
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  68. 2026-05-27 03:38 UTCEG score recompute
  69. 2026-05-26 13:42 UTCEPSS rescore
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  73. 2026-05-25 09:46 UTCOSV refresh

Frequently asked(5)

What is CVE-2020-11066?
CVE-2020-11066 is a high vulnerability published on May 14, 2020. In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.17 and greater than or equal to 10.0.0 and less than 10.4.2, calling unserialize() on malicious user-submitted content can lead to modification of dynamically-determined object attributes and result in triggering deletion of an arbitrary…
When was CVE-2020-11066 disclosed?
CVE-2020-11066 was first published in the National Vulnerability Database on May 14, 2020, 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-2020-11066 actively exploited?
CVE-2020-11066 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 71.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2020-11066?
CVE-2020-11066 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2020-11066?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-11066, 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.

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