Log in / Sign up

Vulnerability details

CVE-2026-87901

phpBB phpBB
CVSS 3.0
8.3High

Official description

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

CVSS scores

ScoreVersionSourceVector
8.3High 3.0 CVEProject cvelistV5 (CNA) (hackerone) CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

Affected products

VendorProductVersionsSource
phpBB phpBB 3.3.0 ≤ v ≤ 3.3.18 CVEProject cvelistV5 (CNA)

References and advisories

1
Kolun on Telegram @kolunsec Exploited CVEs, key news and a daily digest Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.

Details

Published
2026-10-23
Last updated
2026-11-02
State
Published
Assigner (CNA)
hackerone

Exploit prediction (EPSS)

0.32%
Probability of exploitation in 30 days
25.4%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-79
    Cross-site Scripting (XSS) - Reflected