# CVE-2026-78293: WP w3all phpBB cross-site scripting vulnerability

Source: https://junglewise.ai/threats/cve-2026-78293-wp-w3all-phpbb-cross-site-scripting-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-27. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78293 · Severity: high · CVSS 7.1 · Published 2026-08-27

WP w3all phpBB is a WordPress plugin that integrates phpBB forum functionality into WordPress sites. An unauthenticated attacker can inject malicious scripts that execute in the browsers of site visitors, potentially stealing their data or hijacking their accounts. The vulnerability affects versions up to 3.0.6 and requires user interaction (such as clicking a malicious link) to be exploited.

Technologies: [Axew3.Com WP w3all phpBB](https://junglewise.ai/threats/technologies/wp-w3all-phpbb). Vendors: [Axew3.Com](https://junglewise.ai/threats/vendors/axew3-com).

## Quick answers

**Is CVE-2026-78293 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78293 being exploited in the wild.

**How severe is CVE-2026-78293?** High severity, with a CVSS score of 7.1, published 27 August 2026.

**Which products and versions are affected?** Axew3.Com WP w3all phpBB 3.0.6 and earlier.

**Is there a fix for CVE-2026-78293?** A patch was published on 2026-08-27: Fixed in version 3.0.7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-78293 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-78293?** Check whether you run Axew3.Com WP w3all phpBB 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.

## Technical details

This is an unauthenticated Cross-Site Scripting (XSS) vulnerability in the WP w3all phpBB WordPress plugin versions 3.0.6 and earlier. The vulnerability allows attackers to inject malicious scripts that execute in visitor browsers, classified as an injection-type flaw. Although the vulnerability is unauthenticated, successful exploitation requires a privileged user or victim to interact with a crafted payload (such as clicking a malicious link or visiting a specially crafted page). Attackers can leverage this to steal session data, credentials, or hijack user accounts. The vulnerability was patched in version 3.0.7, which is the recommended mitigation.

## Affected products

- axew3.com WP w3all phpBB 3.0.6 and earlier

## Timeline

- 2026-08-25: disclosed: Vulnerability published by Patchstack
- 2026-08-27: patched: Fixed in version 3.0.7

## References

- [https://patchstack.com/database/wordpress/plugin/wp-w3all-phpbb-integration/vulnerability/wordpress-wp-w3all-phpbb-plugin-3-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve](https://patchstack.com/database/wordpress/plugin/wp-w3all-phpbb-integration/vulnerability/wordpress-wp-w3all-phpbb-plugin-3-0-6-cross-site-scripting-xss-vulnerability?_s_id=cve)

## Related threats

- [WP w3all phpBB SQL injection](https://junglewise.ai/threats/cve-2026-121769-improper-neutralization-of-special-elements-used-in-an-sql)
- [WP w3all phpBB SQL injection in subscriber queries](https://junglewise.ai/threats/cve-2026-73998-wp-w3all-phpbb-sql-injection-in-subscriber-queries)