CVE-2026-66917: high-severity vulnerability in joomgalleryfriends.net JoomGallery extension…
Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.4.0
Published · Updated
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.6epss 0.5%
from disclosure to weapon1 days
Published on NVDAug 22
1st PoC+1d
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
Joomla Extension - joomgalleryfriends.net - Stored XSS in JoomGallery < 4.4.0 - An authenticated, privileged can store an XSS payload in any image causing JS execution in every visitor's browser.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products
joomgalleryfriends.net · JoomGallery extension for Joomlapublic PoCs found — 1
githubgithub.com/toanln-cov/CVE-2026-66917★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — joomgalleryfriends.net JoomGallery extension…
In the same product, most dangerous first.
CVE-2026-84048MEDIUMJoomla Extension - joomgalleryfriends.net - Unauthenticated arbitrary file upload via the TUS endpoint in JoomGallery < 4.4.2EPSS 0.5%CVE-2026-66916MEDIUMJoomla Extension - joomgalleryfriends.net - Password-Protected Category Bypass via JSON Format in JoomGallery < 4.4.0EPSS 0.4%
References
https://www.joomgalleryfriends.net/