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Vulnerability record · CVE-2026-29199 · published 4 May 2026

CVE-2026-29199: Phpbb weak password recovery vulnerability

Phpbb · Phpbb

phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL. An attacker who can manipulate the Host header (e.g. through misconfigured host setup or missing header validation by the webserver) can cause password reset emails to contain a link pointing to an attacker-controlled domain, potentially leading to account takeover.

8.1 CVSS 3.1 High EPSS 0.44% · top 64.1% CWE-640 · Weak password recovery
8.1CVSS 3.1 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

phpBB before 3.3.16 is vulnerable to Host Header Injection that can lead to password rest link poisoning. When force_server_vars is disabled, the servers hostname may be extracted from the HTTP Host header which is used to generate the password reset link URL. An attacker who can manipulate the Host header (e.g. through misconfigured host setup or missing header validation by the webserver) can cause password reset emails to contain a link pointing to an attacker-controlled domain, potentially leading to account takeover.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://hackerone.com/reports/3543246 Permissions Required

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2008-3224Phpbb vulnerabilityUnspecified vulnerability in phpBB before 3.0.1 has unknown impact and attack vectors related to "urls gone through redirect() being used within logi…EPSS 1.5%10.0CVE-2008-1766Phpbb vulnerabilityMultiple unspecified vulnerabilities in phpBB before 3.0.1 have unknown impact and attack vectors, related to "two minor security-related bugs."EPSS 1.5%8.8CVE-2025-70810Phpbb cross-site request forgery vulnerabilityCross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary code via the login function and the aut…EPSS 0.25%8.8CVE-2019-16993Phpbb cross-site request forgery vulnerabilityIn phpBB before 3.1.7-PL1, includes/acp/acp_bbcodes.php has improper verification of a CSRF token on the BBCode page in the Administration Control Pa…EPSS 0.80%8.8CVE-2001-1471Phpbb vulnerabilityprefs.php in phpBB 1.4.0 and earlier allows remote authenticated users to execute arbitrary PHP code via an invalid language value, which prevents th…EPSS 7.7%7.5CVE-2019-16108Phpbb code injection vulnerabilityphpBB 3.2.7 allows adding an arbitrary Cascading Style Sheets (CSS) token sequence to a page through BBCode.EPSS 1.1%7.5CVE-2019-9826Phpbb improper input validation vulnerabilityThe fulltext search component in phpBB before 3.2.6 allows Denial of Service.EPSS 2.3%7.5CVE-2017-1000419Phpbb server-side request forgery (ssrf) vulnerabilityphpBB version 3.2.0 is vulnerable to SSRF in the Remote Avatar function resulting allowing an attacker to perform port scanning, requesting internal …EPSS 1.3%

Source: NIST National Vulnerability Database (record CVE-2026-29199), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.