Description
The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e-mail headers, such as a hidden Bcc, and to spoof the sender.
Published: 2026-10-19
Score: 3.8 Low
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories

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History

Mon, 19 Oct 2026 08:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-113
CWE-20

Mon, 19 Oct 2026 07:00:00 +0000

Type Values Removed Values Added
Description The Subscribe to Comments WordPress plugin before 2.3.3 does not sanitise newline characters from a notification sender-name setting before using it in e-mail headers, allowing users with Author-level access and above to inject arbitrary e-mail headers, such as a hidden Bcc, and to spoof the sender.
Title Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
References
Metrics cvssV3_1

{'score': 3.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: WPScan

Published:

Updated: 2026-10-19T09:31:21.214Z

Reserved: 2026-09-15T08:14:21.129Z

Link: CVE-2026-91831

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-19T07:16:32.187

Modified: 2026-10-19T07:16:32.187

Link: CVE-2026-91831

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-19T08:30:13Z

Weaknesses
  • CWE-113

    Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

  • CWE-20

    Improper Input Validation