Stored XSS affecting the AcyMailing plugin for Joomla

published 2023-03-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32371

cvss: 7.2; 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 31%
public exploits: 0; none known

AnyMailing Joomla Plugin is vulnerable to stored cross site scripting (XSS) in templates and emails of AcyMailing, exploitable without authentication when access is granted to the campaign's creation on front-office.

This issue affects AnyMailing Joomla Plugin Enterprise in versions below 8.3.0.

Patch / fix

fixed in 1

acymailing acymailing 8.3.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 20 mo ago (2025-02-11)

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

AcyMailing Newsletter Plugin for Joomla in the Enterprise version

Classification

Weakness

CWE-20 Improper Input Validation
CWE-116 Improper Encoding or Escaping of Output
CWE-79 Improper Neutralization of Input During Web Page Generation

References

acymailing.com /change-log/
release-notes
bugbounty.ch /advisories/CVE-2023-28733
third-party-advisory

Sources

CVE List CVE-2023-28733
NVD CVE-2023-28733

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