How severe is CVE-2023-32070?

CVE-2023-32070 has a CVSS score of 9/10, rated CRITICAL. Immediate patching is strongly recommended.

Which packages are affected by CVE-2023-32070?

CVE-2023-32070 affects the following packages: org.xwiki.rendering:xwiki-rendering-syntax-xhtml (Maven), org.xwiki.platform:xwiki-core-rendering-api (Maven), org.xwiki.rendering:xwiki-rendering-syntax-html (Maven), org.xwiki.rendering:xwiki-rendering-syntax-html5 (Maven), org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml (Maven), org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5 (Maven), org.xwiki.platform:xwiki-platform-annotation-core (Maven). Ecosystems affected: Maven.

How do I fix CVE-2023-32070?

Update org.xwiki.rendering:xwiki-rendering-syntax-xhtml to 14.6-rc-1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-32070 is resolved across your whole dependency graph.

How do I detect CVE-2023-32070 in my Maven dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.rendering:xwiki-rendering-syntax-xhtml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2023-32070 if there is no patch (or I can't update yet)?

Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Is CVE-2023-32070 actively exploited in the wild?

No public exploit code has been indexed for CVE-2023-32070 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2023-32070?

CVE-2023-32070 has an EPSS (Exploit Prediction Scoring System) score of 0.7%, placing it in the 51th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2023-32070?

CVE-2023-32070 is classified as CWE-83 (CWE-83), Cross-site Scripting (XSS) (CWE-79). These weakness types describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2023-32070 published, and has it been updated?

CVE-2023-32070 was published on May 10, 2023 and was last updated on October 30, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven

Not in CISA KEV

CRITICAL severity

CVE-2023-32070 — xwiki-rendering-syntax-xh…

CRITICALFix: xwiki/xwiki-rendering@c40e2f5

CVE-2023-32070 is a critical-severity (CVSS 9) CWE-83 vulnerability in org.xwiki.rendering:xwiki-rendering-syntax-xhtml. A fix is available for org.xwiki.rendering:xwiki-rendering-syntax-xhtml — see the affected versions and patch details below.

Improper Neutralization of Script in Attributes in XWiki (X)HTML renderers

Also known asGHSA-6gf5-c898-7rxp

Published

May 10, 2023

Updated

Oct 30, 2026

Affected

7 pkgs

Patched

6 / 7

Exploits

None indexed

Exploitation data as of Nov 4, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2023-32070.

EPSS Exploitation Probability

via FIRST.org ↗

0.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs51th percentile — riskier than 51% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

7 pkgs affected

☕org.xwiki.rendering:xwiki-rendering-syntax-xhtml☕org.xwiki.platform:xwiki-core-rendering-api☕org.xwiki.rendering:xwiki-rendering-syntax-html☕org.xwiki.rendering:xwiki-rendering-syntax-html5☕org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml☕org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5☕org.xwiki.platform:xwiki-platform-annotation-core

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Impact

HTML rendering didn't check for dangerous attributes/attribute values. This allowed cross-site scripting (XSS) attacks via attributes and link URLs, e.g., supported in XWiki syntax.

Patches

This has been patched in XWiki 14.6 RC1.

Workarounds

There are no known workarounds apart from upgrading to a fixed version.

References

For more information

If you have any questions or comments about this advisory:

Open an issue in Jira XWiki.org
Email us at Security Mailing List

Affected Packages

7 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.xwiki.rendering:xwiki-rendering-syntax-xhtml`	all versions	14.6-rc-1`org.xwiki.rendering:xwiki-rendering-syntax-xhtml:14.6-rc-1`
☕Maven	`org.xwiki.platform:xwiki-core-rendering-api`	all versions	No fix
☕Maven	`org.xwiki.rendering:xwiki-rendering-syntax-html`	all versions	14.6-rc-1`org.xwiki.rendering:xwiki-rendering-syntax-html:14.6-rc-1`
☕Maven	`org.xwiki.rendering:xwiki-rendering-syntax-html5`	all versions	14.6-rc-1`org.xwiki.rendering:xwiki-rendering-syntax-html5:14.6-rc-1`
☕Maven	`org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml`	all versions	14.6-rc-1`org.xwiki.rendering:xwiki-rendering-syntax-annotatedxhtml:14.6-rc-1`
☕Maven	`org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5`	all versions	14.6-rc-1`org.xwiki.rendering:xwiki-rendering-syntax-annotatedhtml5:14.6-rc-1`

Affected Products

2 products · 2 configurations

Application

renderingxwiki

1 version

3.0

Application

xwikixwiki

≤ 14.5

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.xwiki.rendering:xwiki-rendering-syntax-xhtml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.xwiki.rendering:xwiki-rendering-syntax-xhtml to 14.6-rc-1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-32070 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.

Frequently Asked Questions

### Impact HTML rendering didn't check for dangerous attributes/attribute values. This allowed cross-site scripting (XSS) attacks via attributes and link URLs, e.g., supported in XWiki syntax. ### Patches This has been patched in XWiki 14.6 RC1. ### Workarounds There are no known workarounds apart from upgrading to a fixed version. ### References * https://github.com/xwiki/xwiki-rendering/commit/c40e2f5f9482ec6c3e71dbf1fff5ba8a5e44cdc1 * https://jira.xwiki.org/browse/XRENDERING-663 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira