WordPress Yandex Metrica Counter Plugin <= 1.4.3 is vulnerable to Cross Site Scripting (XSS)

published 2023-08-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-38273

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits: 0; none known

Auth. (admin+) Stored Cross-Site Scripting (XSS) vulnerability in Alexander Semikashev Yandex Metrica Counter plugin <= 1.4.3 versions.

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-24)

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

patchstack.com https://patchstack.com/database/vulnerability/counter-yandex-metrica/wordpress-yandex-metrica-counter-plugin-1-4-3-cross-site-scripting-xss-vulnerability?_s_id=cve referenced PoC, tagged "exploit" by a source, unverified

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
NVD	3.1	4.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected products

Alexander Semikashev Yandex Metrica Counter

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/vulnerability/counter-yandex-metrica/wordpress-yandex-metrica-counter-plugin-1-4-3-cross-site-script
vdb-entry, exploit, third-party-advisory

Sources

CVE List CVE-2023-34173
NVD CVE-2023-34173

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