CVE-2025-61788: Opencast is a free, open-source platform to support the management of educational audio and video content

Routine

MEDIUM 5.4UPGRADE

CVE-2025-61788 is a medium-severity flaw (CVSS 5.4) 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, the paella would include and render some user inputs (metadata like title, description, etc.) unfiltered and unmodified. The vulnerability allows attackers to inject and malicious HTML and JavaScript in the player, which would then be executed in the browsers of users watching the prepared media. This can the

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-79
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-2025-61788?

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

Is CVE-2025-61788 being exploited?

CVE-2025-61788 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-2025-61788 affect?

CVE-2025-61788 affects opencast. Severity is medium (CVSS 5.4). 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, the paella would include and render some user inputs (metadata like title, description, etc.) unfilt

How urgent is CVE-2025-61788?

Priority 22/100. No elevated risk signals yet.

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-2025-61906 MEDIUM 4.3 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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