CRITICAL

CVE-2020-27739

CVSS v3

9.8

CRITICAL

EPSS Score

1.8 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2020-27739 yet.

Full record on NVD

Description

A Weak Session Management vulnerability in Citadel WebCit through 926 allows unauthenticated remote attackers to hijack recently logged-in users' sessions. NOTE: this was reported to the vendor in a publicly archived "Multiple Security Vulnerabilities in WebCit 926" thread.

Technical details

Published: 2020-10-28

Frequently asked questions

What is CVE-2020-27739?

Is CVE-2020-27739 actively exploited?

Active exploitation of CVE-2020-27739 has not been confirmed. Its EPSS score was 1.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-27739?

CVE-2020-27739 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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