Unauthenticated RCE affecting the AcyMailing plugin for Joomla

published 2023-03-30 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32369

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

AnyMailing Joomla Plugin is vulnerable to unauthenticated remote code execution, when being granted access to the campaign's creation on front-office due to unrestricted file upload allowing PHP code to be injected.

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: total
Assessed: 20 mo ago (2025-02-11)

Exploit prediction

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugbounty.ch https://www.bugbounty.ch/advisories/CVE-2023-28731 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

AcyMailing Newsletter Plugin for Joomla in the Enterprise version

Classification

Weakness

CWE-20 Improper Input Validation
CWE-434 Unrestricted Upload of File with Dangerous Type

References

bugbounty.ch /advisories/CVE-2023-28731
exploit, third-party-advisory
acymailing.com /change-log/
release-notes

Sources

CVE List CVE-2023-28731
NVD CVE-2023-28731

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