Vulnerability · Published May 26, 2026 · Assigned by GitHub_M

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

High 8.1

In plain English

A high-severity improper input validation in e107 from e107inc. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.3%top 77.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
e107inc	e107	< 2.3.4

Weakness: CWE-20, CWE-807 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References

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