CVE-2026-107843

Published: Ott 09, 2026 Last Modified: Ott 09, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: none
Availability: none

Description

AI Translation Available

Contao is an Open Source CMS. From version 4.1.0 until 5.3.50 and 5.7.12, ModuleRegistration::compile() enters its follow-up registration branch on any POST to a page containing the registration module without verifying FORM_SUBMIT or the preceding captcha result. resendActivationMail() can then invoke OptInToken::send() without rate limiting, allowing an unauthenticated attacker to cause repeated activation emails to be sent to an address with a pending registration and to determine whether that pending registration exists. The branch is reachable only when reg_activate is enabled and the target has an unconfirmed registration and opt-in token. This issue is fixed in versions 5.3.50 and 5.7.12.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0026
Percentile
0,2th
Updated

EPSS Score Trend (Last 2 Days)

204

Observable Response Discrepancy

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Access Control
Potential Impacts:
Read Application Data Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
View CWE Details
770

Allocation of Resources Without Limits or Throttling

Incomplete
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Availability
Potential Impacts:
Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
All platforms may be affected
Likelihood of Exploit: High
View CWE Details
https://github.com/contao/contao/commit/2ea6117f9049db72216…
https://github.com/contao/contao/commit/2ea6117f9049db7221679251cfc41e67d941a74b
https://github.com/contao/contao/releases/tag/5.3.50
https://github.com/contao/contao/releases/tag/5.3.50
https://github.com/contao/contao/releases/tag/5.7.12
https://github.com/contao/contao/releases/tag/5.7.12
https://github.com/contao/contao/security/advisories/GHSA-m…
https://github.com/contao/contao/security/advisories/GHSA-mfxh-vp55-7gc6