CVE-2026-29199HIGH 8.1EPSS p16.0%
CVE-2026-29199CVE-2026-29199
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.
Scoring
| CVSS 3.1 | 8.1 (HIGH) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N |
| EPSS | 0.25% probability of exploitation · percentile 16.0% · 2026-06-19T12:03:05Z |
| Published | 2026-05-04 |
| Last modified | 2026-05-07 |
Underlying weaknesses· 1
References
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Weak Password Recovery Mechanism for Forgotten Passwordcwe-640 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.