baserCMS: Mail-form auto-replies accept multiple visitor-controlled recipients

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-115479
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 14:17:52 UTC
Updated2026-10-23 14:17:52 UTC
DescriptionbaserCMS is a website development framework. In versions 5.2.5 before 5.3.2 and 5.4.0 before 5.4.2, an unauthenticated visitor can supply a comma-separated address list in a public mail form's email field and cause a single auto-reply to be addressed to multiple third parties. MailMessageMailer::sendFormToUser() passes the visitor-controlled userMail value to parseAndNormalizeMailAddresses(), which splits it with explode(',') and supplies every resulting address to setTo(). Newly created forms with an email-type field are affected when the separate, optional VALID_EMAIL server-side validation is not enabled; browser type=email validation does not prevent crafted requests. The bundled contact form enables VALID_EMAIL and is not affected. The auto-reply uses the site's sender identity and includes partially attacker-controlled content, allowing abuse of the site to deliver unsolicited mail. This issue has been patched in versions 5.3.2 and 5.4.2.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Problem Types: CWE-20 | CWE-20 CWE-20: Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Baserproject Basercms affected >= 5.2.5, < 5.3.2 Not specified
CNA Baserproject Basercms affected >= 5.4.0, < 5.4.2 Not specified

References

ReferenceSourceLinkTags
github.com/baserproject/basercms/releases/tag/5.3.2 [email protected] github.com
github.com/baserproject/basercms/security/advisories/GHSA-w47c-4g8m-gjv9 [email protected] github.com
github.com/baserproject/basercms/releases/tag/5.4.2 [email protected] github.com
github.com/baserproject/basercms/commit/99e6257c9d5e2fa2bff2351defcb9fb3... [email protected] github.com
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