CVE-2020-5206

Authentication Bypass For Endpoints With Anonymous Access in OpenCast

CRITICAL
10
CVSS Score
Published: January 30, 2020 at 09:25 PM UTC
Updated: June 17, 2026 at 03:21 AM UTC
2 products affected across 2 vendorsOpencastOpencast

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Severity
CRITICAL10
Exploit prediction
EPSS 1%

Description

In Opencast before 7.6 and 8.1, using a remember-me cookie with an arbitrary username can cause Opencast to assume proper authentication for that user even if the remember-me cookie was incorrect given that the attacked endpoint also allows anonymous access. This way, an attacker can, for example, fake a remember-me token, assume the identity of the global system administrator and request non-public content from the search service without ever providing any proper authentication. This problem is fixed in Opencast 7.6 and Opencast 8.1

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 7.68.0
Affected range stops below 7.6, so it looks safe — our inference, not a vendor statement
v < 7.6v < 8.1
Affected range stops below 7.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-285CWE-287

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