CVE-2026-27370
Published: 05 March 2026
Summary
CVE-2026-27370 is a high-severity Insertion of Sensitive Information Into Sent Data (CWE-201) vulnerability. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 14.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 AU-13 (Monitoring for Information Disclosure) and SI-15 (Information Output Filtering).
Deeper analysis
CVE-2026-27370 is an Insertion of Sensitive Information Into Sent Data vulnerability (CWE-201) in the Premio Chaty WordPress plugin. It affects Chaty versions from n/a through 3.5.1 and allows attackers to retrieve embedded sensitive data. The vulnerability carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N), reflecting high severity primarily due to its confidentiality impact.
Remote attackers can exploit this vulnerability over the network with low complexity, requiring no privileges, authentication, or user interaction. Successful exploitation enables retrieval of sensitive information embedded in transmitted data, potentially exposing confidential details without affecting integrity or availability.
The Patchstack advisory (https://patchstack.com/database/Wordpress/Plugin/chaty/vulnerability/wordpress-chaty-plugin-3-5-1-sensitive-data-exposure-vulnerability?_s_id=cve) documents this sensitive data exposure issue in Chaty 3.5.1, providing details for security practitioners to assess and address the risk in affected WordPress environments.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-9628
Vulnerability details
Insertion of Sensitive Information Into Sent Data vulnerability in Premio Chaty chaty allows Retrieve Embedded Sensitive Data.This issue affects Chaty: from n/a through <= 3.5.1.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The vulnerability is an unauthenticated information disclosure flaw in a public-facing WordPress plugin, directly enabling remote exploitation of a web application to retrieve sensitive data.
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Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly mitigates the CVE by requiring timely identification, reporting, and patching of the flaw in Premio Chaty versions through 3.5.1 that inserts sensitive information into sent data.
Prevents exploitation by filtering sensitive information from outputs transmitted by the Chaty plugin, directly addressing the insertion of retrievable embedded sensitive data.
Monitors the system specifically for unauthorized disclosures of sensitive information, enabling detection of exploitation attempts retrieving embedded data from Chaty transmissions.