CVE-2026-43935: e107: Host Header Injection in e107 password reset enables phishing

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-26 · updated 2026-07-24
Weakness: CWE-20

Description

e107 is a content management system (CMS). Prior to 2.3.4, a Host Header Injection vulnerability in the password reset page allows attackers to manipulate the Host header to generate password reset links pointing to attacker-controlled domains. This can lead to phishing attacks, account takeover, or other security risks. The severity is high, as the vulnerability affects a critical function related to user authentication. This vulnerability is fixed in 2.3.4.

Affected products

e107inc e107: before 2.3.4

References

https://github.com/e107inc/e107/commit/04511f9f1d6e97c31ba7cc5bf7f1f9a19d221db6
https://github.com/e107inc/e107/commit/b0dee8234e273debbf7a8ae054de464f1008f357
https://github.com/e107inc/e107/commit/c4f9f71b0fd695545d0f09e2277b6f70ff4660fc
https://github.com/e107inc/e107/security/advisories/GHSA-7pmw-jwvr-cq2x
https://github.com/e107inc/e107/security/advisories/GHSA-7pmw-jwvr-cq2x

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