CVE-2026-78146: CWE-200 Information Exposure in Simple Newsletter Plugin
Description
The Simple Newsletter Plugin for WordPress before version 4.3.3 has an information exposure vulnerability. It does not verify that the requester is the subscriber before displaying stored subscriber details. This allows unauthenticated users to access personal subscriber data and the key that authorizes changes to their records.
CVSS v3.1
Score 6.5medium
Affected software
Simple Newsletter Plugin
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-78146 is an information exposure vulnerability (CWE-200) in the Simple Newsletter Plugin for WordPress. Versions prior to 4.3.3 fail to verify that the requester is the subscriber named in a public request before rendering that subscriber's stored details. This flaw enables unauthenticated attackers to disclose personal subscriber data along with the authorization key for modifying the subscriber's record.
Potential Impact
An unauthenticated attacker can retrieve personal data of subscribers and the key used to authorize changes to subscriber records. This could lead to privacy violations and unauthorized modifications of subscriber information. There is no indication of impact to system availability or integrity beyond the exposure and potential misuse of subscriber data.
Mitigation Recommendations
No official patch or remediation level is currently confirmed. Users should upgrade to version 4.3.3 or later once available, as the vulnerability affects versions before 4.3.3. Until a patch is released, restrict access to subscriber data endpoints if possible. Monitor the vendor advisory for updates on fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-23T06:36:37.954Z
- State
- PUBLISHED
Threat ID: 6a8e82c0acd9273b4979d522
Added to database: 08/26/2026, 06:08:00 UTC
Last enriched: 09/10/2026, 11:53:43 UTC
Last updated: 10/09/2026, 06:48:19 UTC
Views: 62
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