vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2021-43807

HTTP Method Spoofing in Opencast

MEDIUM
6.5
CVSS Score
Published: December 14, 2021 at 06:10 PM UTC
Updated: June 17, 2026 at 04:11 AM UTC
2 products affected across 2 vendorsOpencastOpencast

Using opencast by opencast?

Get instant alerts when new vulnerabilities affect opencast - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
MEDIUM6.5
Exploit prediction
EPSS 1%

Description

Opencast is an Open Source Lecture Capture & Video Management for Education. Opencast versions prior to 9.10 allow HTTP method spoofing, allowing to change the assumed HTTP method via URL parameter. This allows attackers to turn HTTP GET requests into PUT requests or an HTTP form to send DELETE requests. This bypasses restrictions otherwise put on these types of requests and aids in cross-site request forgery (CSRF) attacks, which would otherwise not be possible. The vulnerability allows attackers to craft links or forms which may change the server state. This issue is fixed in Opencast 9.10 and 10.0. You can mitigate the problem by setting the `SameSite=Strict` attribute for your cookies. If this is a viable option for you depends on your integrations. We strongly recommend updating in any case.

Affected

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

Opencast· Apereo
95%
v < 9.10
Affected range stops below 9.10, so it looks safe — our inference, not a vendor statement
Opencast· Opencastmaven
60%
v < 9.10
Affected range stops below 9.10, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/opencast/opencast/commit/59cb6731067283e54f15462be38b6117d8b9ea8b#diff-9c5fb3d1b7e3b0f54bc5c4182965c4fe1f9023d449017cece3005d3f90e8e4d8
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/opencast/opencast/commit/8f8271e1085f6f8e306c689d6a56b0bb8d076444
x_refsource_CONFIRMExploitPatchThird Party Advisory
Source: [email protected]
https://github.com/opencast/opencast/security/advisories/GHSA-j4mm-7pj3-jf7v

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-290

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card