# CVE-2021-29459: XSS Cross Site Scripting

Source: https://junglewise.ai/threats/cve-2021-29459-xss-cross-site-scripting  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-04-22  
License: CC BY 4.0 with a link back

CVE-2021-29459 · Severity: low · CVSS 3.1 · Published 2021-04-22

XSS Cross Site Scripting

Technologies: [org.xwiki.platform:xwiki-platform-oldcore (Maven)](https://junglewise.ai/threats/technologies/org-xwiki-platform-xwiki-platform-oldcore), [org.xwiki.platform:xwiki-platform-web (Maven)](https://junglewise.ai/threats/technologies/org-xwiki-platform-xwiki-platform-web). Vendors: [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2021-29459 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2021-29459 being exploited in the wild.

**How severe is CVE-2021-29459?** Low severity, with a CVSS score of 3.1, published 22 April 2021.

**Which products and versions are affected?** org.xwiki.platform:xwiki-platform-oldcore (Maven) ECOSYSTEM:introduced=0,fixed=12.6.3; org.xwiki.platform:xwiki-platform-web (Maven) ECOSYSTEM:introduced=0,fixed=12.6.3.

**Is there a fix for CVE-2021-29459?** Yes. org.xwiki.platform:xwiki-platform-oldcore (Maven): upgrade to 12.6.3 or later; org.xwiki.platform:xwiki-platform-web (Maven): upgrade to 12.6.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2021-29459?** Check whether you run org.xwiki.platform:xwiki-platform-oldcore (Maven) or org.xwiki.platform:xwiki-platform-web (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- org.xwiki.platform:xwiki-platform-oldcore (Maven): upgrade to 12.6.3 or later

  ```sh
  # set org.xwiki.platform:xwiki-platform-oldcore to 12.6.3 in your pom.xml or build.gradle
  ```

- org.xwiki.platform:xwiki-platform-web (Maven): upgrade to 12.6.3 or later

  ```sh
  # set org.xwiki.platform:xwiki-platform-web to 12.6.3 in your pom.xml or build.gradle
  ```


## Affected products

- org.xwiki.platform:xwiki-platform-oldcore (Maven) ECOSYSTEM:introduced=0,fixed=12.6.3
- org.xwiki.platform:xwiki-platform-web (Maven) ECOSYSTEM:introduced=0,fixed=12.6.3

## Identifiers

- CVE-2021-29459
- GHSA-5c66-v29h-xjh8

## Related threats

- [XWiki Platform path traversal in skin action endpoint](https://junglewise.ai/threats/cve-2026-34151-xwiki-platform-path-traversal-in-skin-action-endpoint)
- [XWiki's REST APIs can list all pages/spaces, leading to unavailability](https://junglewise.ai/threats/cve-2026-40104-xwiki-s-rest-apis-can-list-all-pages-spaces-leading-to)
- [XWiki Platform sandbox bypass in Velocity scripting API](https://junglewise.ai/threats/cve-2026-33229-xwiki-platform-sandbox-bypass-in-velocity-scripting-api)
- [XWiki vulnerable to click-jacking through CSS injection in comments](https://junglewise.ai/threats/cve-2026-26000-xwiki-vulnerable-to-click-jacking-through-css-injection-in)
- [XWiki exposes passwords and emails stored in fields not named password/email in xml.vm](https://junglewise.ai/threats/cve-2025-54125-xwiki-exposes-passwords-and-emails-stored-in-fields-not-named)