CVE-2020-27739
A Weak Session Management vulnerability in Citadel WebCit through 926 allows unauthenticated...
CVE-2020-27739 is a critical vulnerability (CVSS 9.8) in Citadel Webcit, published October 28, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.84%, the 78th percentile. No source names a fixed version.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2020-27739- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-613
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2020-27739- Updated
- 2026-11-02
EUVDEUVD-2020-20243 No score
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.
- Record
EUVD-2020-20243- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f928-h33x-jm46 No score
A Weak Session Management vulnerability in Citadel WebCit through 926 allows unauthenticated...
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.
- Record
GHSA-f928-h33x-jm46- Weakness
- CWE-613
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2020-27739
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.
- Record
UBUNTU-CVE-2020-27739- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
webcitUbuntu:16.04:LTS |
All versions, plus listed versions 9.01-dfsg-1 |
None known |
webcitUbuntu:18.04:LTS |
All versions, plus listed versions 904-dfsg-1917-dfsg-1build1917-dfsg-2 |
None known |
webcitUbuntu:20.04:LTS |
All versions, plus listed versions 917-dfsg-3917-dfsg-4 |
None known |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |