WordPress Newsletter subscription optin module plugin <= 1.2.9 - Cross Site Request Forgery (CSRF) to Stored XSS vulnerability

published 2025-08-28 14 mo ago modified 2026-10-18 21 d ago also EUVD-2025-26050

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 2%
public exploits: 0; none known

Cross-Site Request Forgery (CSRF) vulnerability in nonletter Newsletter subscription optin module newsletter-subscription-widget-for-sendblaster allows Stored XSS.This issue affects Newsletter subscription optin module: from n/a through <= 1.2.9.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 14 mo ago (2025-08-28)

Exploit prediction

0.12% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

Affected products

nonletter Newsletter subscription optin module

Classification

Weakness

CWE-352 Cross-Site Request Forgery

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/Wordpress/Plugin/newsletter-subscription-widget-for-sendblaster/vulnerability/wordpress-newsletter-s
vdb-entry

Sources

CVE List CVE-2025-48308
NVD CVE-2025-48308

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary