Is CVE-2021-20784 in the CISA KEV catalog?

No. CVE-2021-20784 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-20784?

CVE-2021-20784 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-20784?

CVE-2021-20784 has an EPSS score of 1.12% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-20784?

Upgrade everything to 1.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-20784

MEDIUM

6.1

CVSS v3

NVD

Description

HTTP header injection vulnerability in Everything version 1.0, 1.1, and 1.2 except the Lite version may allow a remote attacker to inject an arbitrary script or alter the website that uses the product.

CWE-644

How to fix

Remediation Available

everythingNVD

Affected:>= 1.2, < 1.3Fixed in:1.3CVE-2021-20784derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploit Intelligence

1.12%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

jvn.jp

Other references1

jvn.jp

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-12-03.