CVE-2026-43935: CWE-20: Improper Input Validation in e107inc e107
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.
AI Analysis
Technical Summary
CVE-2026-43935 describes a Host Header Injection vulnerability in the e107 content management system before version 2.3.4. The vulnerability arises from improper input validation (CWE-20) and inadequate authentication protection (CWE-807) on the password reset page. Attackers can manipulate the Host header in HTTP requests to generate password reset links that redirect users to malicious domains, facilitating phishing or account compromise. The vulnerability affects a critical authentication function and has a CVSS 3.1 base score of 8.1 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N). The issue is resolved in e107 version 2.3.4.
Potential Impact
Successful exploitation can lead to phishing attacks and account takeover by tricking users into clicking password reset links that appear legitimate but redirect to attacker-controlled domains. The confidentiality and integrity of user accounts are at high risk. Availability is not impacted. The vulnerability affects all e107 installations running versions prior to 2.3.4.
Mitigation Recommendations
Upgrade e107 to version 2.3.4 or later, where this vulnerability is fixed. Since this is a self-hosted CMS, administrators must apply the update manually. Patch status is confirmed by the vendor's versioning information. No additional mitigations are specified.
CVE-2026-43935: CWE-20: Improper Input Validation in e107inc e107
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.
CVSS v3.1
Score 8.1high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-43935 describes a Host Header Injection vulnerability in the e107 content management system before version 2.3.4. The vulnerability arises from improper input validation (CWE-20) and inadequate authentication protection (CWE-807) on the password reset page. Attackers can manipulate the Host header in HTTP requests to generate password reset links that redirect users to malicious domains, facilitating phishing or account compromise. The vulnerability affects a critical authentication function and has a CVSS 3.1 base score of 8.1 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N). The issue is resolved in e107 version 2.3.4.
Potential Impact
Successful exploitation can lead to phishing attacks and account takeover by tricking users into clicking password reset links that appear legitimate but redirect to attacker-controlled domains. The confidentiality and integrity of user accounts are at high risk. Availability is not impacted. The vulnerability affects all e107 installations running versions prior to 2.3.4.
Mitigation Recommendations
Upgrade e107 to version 2.3.4 or later, where this vulnerability is fixed. Since this is a self-hosted CMS, administrators must apply the update manually. Patch status is confirmed by the vendor's versioning information. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-04T16:59:09.089Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a15c089891d628fdc570d1a
Added to database: 5/26/2026, 3:47:21 PM
Last enriched: 5/26/2026, 4:02:08 PM
Last updated: 5/26/2026, 9:52:08 PM
Views: 2
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