Is CVE-2021-42761 in the CISA KEV catalog?

No. CVE-2021-42761 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42761?

CVE-2021-42761 has a CVSS v3 base score of 9.0 (CRITICAL).

What is the EPSS score for CVE-2021-42761?

CVE-2021-42761 has an EPSS score of 1.47% (70th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42761?

Upgrade fortiweb to 7.0.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-42761

CRITICALEPSS 70th pctl

9.0

CVSS v3

NVD

Description

A condition for session fixation vulnerability [CWE-384] in the session management of FortiWeb versions 6.4 all versions, 6.3.0 through 6.3.16, 6.2.0 through 6.2.6, 6.1.0 through 6.1.2, 6.0.0 through 6.0.7, 5.9.0 through 5.9.1 may allow a remote, unauthenticated attacker to infer the session identifier of other users and possibly usurp their session.

CWE-384

How to fix

Remediation Available

fortiwebNVD

Affected:>= 6.4.0, < 7.0.0Fixed in:7.0.0CVE-2021-42761derived 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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.47%probability of exploitation in 30 days

70thpercentile

Elevated risk: more likely to be exploited than 70% of all known CVEs.

References

Vendor Advisory1

fortiguard.com

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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 2024-11-21.