CVE-2026-33402: Sakai is a Collaboration and Learning Environment (CLE)

Routine

MEDIUM 6.1UPGRADE

CVE-2026-33402 is a medium-severity flaw (CVSS 6.1) affecting sakai. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sakai is a Collaboration and Learning Environment (CLE). In versions 23.0 through 23.4 and 25.0 through 25.1, group titles and description can contain cross-site scripting scripts. The patch is included in releases 25.2 and 23.5. As a workaround, one can check the SAKAI_SITE_GROUP table for titles and descriptions that contain this info.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-03-26
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-26 17:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

sakailms sakai UPGRADE

Affected: >= 23.0 and < 23.5 · >= 25.0 and < 25.2

Fixed in: 23.5, 25.2

Safe to downgrade to: a release before 23.0

1. Check installed version

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

2. UPGRADE to 23.5 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sakai

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 23.0 (Debian / Ubuntu)

apt-cache madison sakai sudo apt install sakai=<VERSION_BEFORE_23.0> sudo apt-mark hold sakai

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

dnf --showduplicates list sakai sudo dnf downgrade sakai-<VERSION_BEFORE_23.0> sudo dnf versionlock add sakai

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-2026-33402?

sakai: upgrade to 23.5, 25.2. Exact commands for each OS are on this page.

Is CVE-2026-33402 being exploited?

CVE-2026-33402 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-2026-33402 affect?

CVE-2026-33402 affects sakai. Severity is medium (CVSS 6.1). Sakai is a Collaboration and Learning Environment (CLE). In versions 23.0 through 23.4 and 25.0 through 25.1, group titles and description can contain cross-site scripting scripts. The patch is included in releases 25.2 and 23.5. As a worka

How urgent is CVE-2026-33402?

Priority 24/100. No elevated risk signals yet.

References

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