Improper sanitization in the registration module allows reflected Cross-Site Scripting.

No CVSS v4.0

No CVSS v3.1

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact Low

User Interaction Required

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
phpBB phpBB unaffected
Version Status Constraints
3.3.0 affected ≤ 3.3.18

No data.

No data.

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No data.

Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.phpbb.com/community/viewtopic.php?t=2675305 cve-icon cve-icon
History

Fri, 23 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Title phpBB Registration Module XSS Vulnerability

Fri, 23 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description Improper sanitization in the registration module allows reflected Cross-Site Scripting.
Weaknesses CWE-79
References
Metrics cvssV3_0

{'score': 8.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: hackerone

Published:

Updated: 2026-10-23T16:15:05.780Z

Reserved: 2026-09-09T15:00:00.574Z

Link: CVE-2026-87901

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-23T17:17:22.137

Modified: 2026-10-23T17:17:22.250

Link: CVE-2026-87901

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T17:30:17Z

Weaknesses