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» CVE-2020-5222
Opencast before 7.6 and 8.1 enables a remember-me cookie based on a hash created from the username, password, and an additional system key. This means that an attacker getting access to a remember-me token for one server can get access to all servers which allow log-in using the same credentials without ever needing the credentials. This problem is fixed in Opencast 7.6 and Opencast 8.1
NVD Status： Modified ，CVE State: published
Threat Intelligence & Risk Assessment for CVE-2020-5222
Conclusion & alert: CVE-2020-5222 is rated Moderate Risk (47.5/100) : CVSS Medium severity, with medium exploitation likelihood (EPSS 0.94%).Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
Exploit prediction scoring system (EPSS) score for CVE-2020-5222
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
#
Date
Old EPSS score
New EPSS score
Delta (New - Old)
1
2026-06-15
0.25%
0.94%
+0.69%
2
2026-05-06
0.26%
0.25%
-0.01%
3
2025-11-21
—
0.26%
—
Full EPSS history
(13 records total)
Common vulnerability scoring system (CVSS) metrics for CVE-2020-5222
CVSS metrics for this CVE.
Base score
Version
Severity
Vector
Exploitability
Impact
Score source
6.8
3.1
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
2.3
4.0
[email protected]
8.8
3.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
2.8
5.9
[email protected]
6.5
2.0
MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P
Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
8.0
6.4
[email protected]
Weakness enumeration for CVE-2020-5222
GitHub Security Advisory for CVE-2020-5222
GHSA-mh8g-hprg-8363 · Severity: medium · Ecosystem: maven
— Hard-Coded Key Used For Remember-me Token in Opencast
Affected software / configurations for CVE-2020-5222
Vendor
Product
Version
Raw CPE
apereo
opencast
< 7.6
cpe:2.3:a:apereo:opencast:*:*:*:*:*:*:*:*
apereo
opencast
8.0
cpe:2.3:a:apereo:opencast:8.0:*:*:*:*:*:*:*
References for CVE-2020-5222
cvelogic
Threat Intelligence