CVE-2023-29528: XWiki Commons are technical libraries common to several other top level XWiki projects

This month

CRITICAL 9.0UPGRADE

CVE-2023-29528 is a critical-severity flaw (CVSS 9.0) affecting commons. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

XWiki Commons are technical libraries common to several other top level XWiki projects. The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injection of arbitrary HTML code and thus cross-site scripting via invalid HTML comments. As a consequence, any code relying on this "restricted" mode for security is vulnerable to JavaScript injection ("cross-site

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-79
Published	2023-04-20
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2023-04-20 18:15 UTCPublished CVE record published
2026-06-17 05:50 UTCUpdated Record last modified

xwiki commons UPGRADE

Affected: >= 4.3 and < 14.10 · 4.2 · 4.2 milestone1 · 4.2 milestone2 · 4.2 milestone3 · 4.2 rc1

Fixed in: 14.10

Safe to downgrade to: a release before 4.2

1. Check installed version

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

2. UPGRADE to 14.10 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade commons

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 4.2 (Debian / Ubuntu)

apt-cache madison commons sudo apt install commons=<VERSION_BEFORE_4.2> sudo apt-mark hold commons

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

dnf --showduplicates list commons sudo dnf downgrade commons-<VERSION_BEFORE_4.2> sudo dnf versionlock add commons

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-2023-29528?

commons: upgrade to 14.10. Exact commands for each OS are on this page.

Is CVE-2023-29528 being exploited?

CVE-2023-29528 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-2023-29528 affect?

CVE-2023-29528 affects commons. Severity is critical (CVSS 9.0). XWiki Commons are technical libraries common to several other top level XWiki projects. The "restricted" mode of the HTML cleaner in XWiki, introduced in version 4.2-milestone-1 and massively improved in version 14.6-rc-1, allowed the injec

How urgent is CVE-2023-29528?

Priority 54/100. Critical severity; Public exploit reference

Related CVEs

CVE-2023-36471 CRITICAL 9.0 UPGRADE Xwiki commons is the common modules used by other XWiki top level projects
CVE-2022-24898 MEDIUM 4.9 UPGRADE org.xwiki.commons:xwiki-commons-xml is a common module used by other XWiki top level projects
CVE-2014-8747 MEDIUM 4.3 DOWNGRADE Cross-site scripting (XSS) vulnerability in the Drupal Commons module 7.x-3.x before 7.x-3.9 for Drupal allows
CVE-2013-1908 MEDIUM 5.0 UPGRADE UPGRADE The Commons Wikis module before 7.x-3.1 for Drupal, as used in the Commons module before 7.x-3.1, does not pro
CVE-2013-1907 MEDIUM 5.0 UPGRADE UPGRADE The Commons Group module before 7.x-3.1 for Drupal, as used in the Commons module before 7.x-3.1, does not pro

References

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