The visitors-online plugin before 1.0.0 for WordPress has multiple XSS issues.

published 2019-08-21 7 y ago modified 2026-06-17 4 mo ago also EUVD-2017-9653

cvss: 6.1; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.6%; EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits: 0; none known, plus a Nuclei check

Patch / fix

fixed in 1

bestwebsoft visitors_online 1.0.0

Exploit prediction

1.62% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

Nuclei template Visitors Online by BestWebSoft < 1.0.0 - Cross-Site Scripting nuclei detection template

CVSS scores

assigned by	version	score	vector
NVD	3.0	6.1	CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

wordpress.org /plugins/visitors-online/#developers
release-notes

Sources

CVE List CVE-2017-18537
NVD CVE-2017-18537

Fencer Intel 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