CVE-2025-61906: Opencast is a free, open-source platform to support the management of educational audio and video content

Routine

MEDIUM 4.3UPGRADE

CVE-2025-61906 is a medium-severity flaw (CVSS 4.3) affecting opencast. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Opencast is a free, open-source platform to support the management of educational audio and video content. Prior to Opencast 17.8 and 18.2, in some situations, Opencast's editor may publish a video without notifying the user. This may lead to users accidentally publishing media not meant for publishing, and thus possibly exposing internal media. This risk of this actually impacting someone is very low, though. This can only be triggered by users

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-200
Published	2025-10-08
Last modified	2026-10-19

Publisher (CNA): GitHub, Inc. · Vendor: apereo

Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-08 18:15 UTCPublished CVE record published
2026-10-19 16:10 UTCUpdated Record last modified

apereo opencast UPGRADE

Affected: < 17.8 · >= 18.0 and < 18.2

Fixed in: 17.8, 18.2

Safe to downgrade to: a release before 18.0

1. Check installed version

apt-cache policy opencast || rpm -q opencast || opencast --version

2. UPGRADE to 17.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade opencast

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade opencast

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 18.0 (Debian / Ubuntu)

apt-cache madison opencast sudo apt install opencast=<VERSION_BEFORE_18.0> sudo apt-mark hold opencast

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list opencast sudo dnf downgrade opencast-<VERSION_BEFORE_18.0> sudo dnf versionlock add opencast

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-61906?

opencast: upgrade to 17.8, 18.2. Exact commands for each OS are on this page.

Is CVE-2025-61906 being exploited?

CVE-2025-61906 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-61906 affect?

CVE-2025-61906 affects opencast. Severity is medium (CVSS 4.3). Opencast is a free, open-source platform to support the management of educational audio and video content. Prior to Opencast 17.8 and 18.2, in some situations, Opencast's editor may publish a video without notifying the user. This may lead

How urgent is CVE-2025-61906?

Priority 26/100. Public exploit reference

Related CVEs

CVE-2025-55202 MEDIUM 5.3 UPGRADE Opencast is a free, open-source platform to support the management of educational audio and video content
CVE-2025-61788 MEDIUM 5.4 UPGRADE Opencast is a free, open-source platform to support the management of educational audio and video content
CVE-2025-54380 MEDIUM 6.5 UPGRADE Opencast is a free, open-source platform to support the management of educational audio and video content
CVE-2024-52797 MEDIUM 6.5 UPGRADE Opencast is free and open source software for automated video capture and distribution

References

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