CVE-2023-27922
Published: 23 May 2023
Summary
CVE-2023-27922 is a medium-severity Cross-site Scripting (CWE-79) vulnerability in Thenewsletterplugin Newsletter. Its CVSS base score is 6.1 (Medium).
Operationally, ranked in the top 11.5% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2023-27922 is a cross-site scripting vulnerability, tracked under CWE-79, that affects the Newsletter WordPress plugin in versions prior to 7.6.9. The flaw permits injection of arbitrary scripts and carries a CVSS 3.1 base score of 6.1 reflecting network attack vector, low attack complexity, no required privileges, required user interaction, and changed scope with limited confidentiality and integrity consequences.
A remote unauthenticated attacker can exploit the issue by supplying crafted input that is rendered in a victim's browser session. Successful exploitation allows the attacker to execute arbitrary script code within the context of the affected site, potentially leading to session hijacking, defacement, or theft of sensitive information displayed to the user.
Advisories published by JVN and the plugin's WordPress repository page indicate that the issue is resolved by upgrading to Newsletter version 7.6.9 or later.
EPSS for the CVE rose from a low baseline to a peak of 0.0983 on 2025-12-11 before receding to the current value of 0.0387, indicating a period of increased exploitation interest after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-31648
Vulnerability details
Cross-site scripting vulnerability in Newsletter versions prior to 7.6.9 allows a remote unauthenticated attacker to inject an arbitrary script.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Validates web inputs to reject script-related content that could produce XSS.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.