WordPress Add to Calendar Button Plugin < 1.5.1 is vulnerable to Cross Site Scripting (XSS)

published 2023-11-08 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-50815

cvss: 6.5; 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 35%
public exploits: 0; none known

Auth. (contributor+) Stored Cross-Site Scripting (XSS) vulnerability in Jens Kuerschner Add to Calendar Button plugin <= 1.5.1 versions.

Patch / fix

fixed in 1

Jens Kuerschner Add to Calendar Button 1.5.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-09-04)

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L
CISA ADP	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Affected products

Jens Kuerschner Add to Calendar Button

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

Technology feeds

WordPress rss critical rss

References

patchstack.com /database/vulnerability/add-to-calendar-button/wordpress-add-to-calendar-button-plugin-1-5-1-cross-site-script
vdb-entry, third-party-advisory

Sources

CVE List CVE-2023-46613
NVD CVE-2023-46613

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