WordPress Really Simple Under Construction Page plugin <= 1.4.6 - Cross Site Scripting (XSS) Vulnerability

published 2025-05-07 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-13779

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits: 0; none known

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Jonas Hjalmarsson Really Simple Under Construction Page really-simple-under-construction allows Stored XSS.This issue affects Really Simple Under Construction Page: from n/a through <= 1.4.6.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-05-07)

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.9	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

Affected products

Jonas Hjalmarsson Really Simple Under Construction Page

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/Wordpress/Plugin/really-simple-under-construction/vulnerability/wordpress-really-simple-under-constr
vdb-entry

Sources

CVE List CVE-2025-47593
NVD CVE-2025-47593

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