CVE-2026-33229: XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it

Q: How do I fix CVE-2026-33229?

xwiki: upgrade to 17.4.8, 17.10.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-33229 being exploited?

CVE-2026-33229 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33229 affect?

CVE-2026-33229 affects xwiki. Severity is critical (CVSS 9.8). XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.4.8 and 17.10.1, an improperly protected scripting API allows any user with script right to bypass the sandboxing of the Ve

Q: How urgent is CVE-2026-33229?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-33229 is a critical-severity flaw (CVSS 9.8) affecting xwiki. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.4.8 and 17.10.1, an improperly protected scripting API allows any user with script right to bypass the sandboxing of the Velocity scripting API and execute, e.g., arbitrary Python scripts, allowing full access to the XWiki instance and thereby compromising the confidentiality, integrity and availability of the whole instance. Note

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 55%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-08
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 16:16 UTCPublished CVE record published
2026-07-24 23:10 UTCUpdated Record last modified

xwiki xwiki UPGRADE

Affected: >= 17.0.0 and < 17.4.8 · >= 17.5.0 and < 17.10.1

Fixed in: 17.4.8, 17.10.1

Safe to downgrade to: a release before 17.0.0

1. Check installed version

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

2. UPGRADE to 17.4.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xwiki

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 17.0.0 (Debian / Ubuntu)

apt-cache madison xwiki sudo apt install xwiki=<VERSION_BEFORE_17.0.0> sudo apt-mark hold xwiki

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

dnf --showduplicates list xwiki sudo dnf downgrade xwiki-<VERSION_BEFORE_17.0.0> sudo dnf versionlock add xwiki

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.

Exact fixes by distribution

Maven · org.xwiki.platform:xwiki-platform-oldcore · FIXED · 17.4.8 · vulnerable: >= 17.0.0-rc-1, < 17.4.8 · source

Set org.xwiki.platform:xwiki-platform-oldcore to 17.4.8 or later in pom.xml or build.gradle, then rebuild and redeploy.

Maven · org.xwiki.platform:xwiki-platform-legacy-oldcore · FIXED · 17.4.8 · vulnerable: >= 17.0.0-rc-1, < 17.4.8 · source

Set org.xwiki.platform:xwiki-platform-legacy-oldcore to 17.4.8 or later in pom.xml or build.gradle, then rebuild and redeploy.

Fedora 46 · python-googleapis-common-protos · FIXED · 1.75.5-1.fc46~bootstrap · FEDORA-2026-d911c4c4e6 · source

sudo dnf upgrade --advisory=FEDORA-2026-d911c4c4e6

Fedora ELN · see advisory · FIXED · FEDORA-2026-e3987c278f · source

sudo dnf upgrade --advisory=FEDORA-2026-e3987c278f

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: azefzafyoussef/CVE-2026-33229 (0 stars)

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-2026-33229?

xwiki: upgrade to 17.4.8, 17.10.1. Exact commands for each OS are on this page.

Is CVE-2026-33229 being exploited?

CVE-2026-33229 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-2026-33229 affect?

CVE-2026-33229 affects xwiki. Severity is critical (CVSS 9.8). XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it. Prior to 17.4.8 and 17.10.1, an improperly protected scripting API allows any user with script right to bypass the sandboxing of the Ve

How urgent is CVE-2026-33229?

Priority 59/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-40104 HIGH 8.2 UPGRADE XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it
CVE-2026-40105 MEDIUM 6.1 UPGRADE XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it
CVE-2023-29525 CRITICAL 9.9 UPGRADE XWiki Platform is a generic wiki platform offering runtime services for applications built on top of it

References

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