Joomla Extension - svenbluege.de - Reflected XSS and open redirect in Event Gallery extension < 6.5.0

published 2026-09-27 43 d ago modified 2026-10-27 12 d ago also EUVD-2026-87928

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 3%
public exploits: 0; none known

Joomla Extension - svenbluege.de - Reflected XSS and open redirect in Event Gallery extension < 6.5.0 - The “return” parameter is base64-decoded and written to the “Back” link without being validated.

Patch / fix

fixed in 1

svenbluege event_gallery 6.5.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 40 d ago (2026-09-30)

Exploit prediction

0.14% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CNA	4.0	5.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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

svenbluege.de Event Gallery for Joomla

Classification

Weakness

CWE-601 URL Redirection to Untrusted Site
CWE-79 Improper Neutralization of Input During Web Page Generation

References

svenbluege.de /
product

Sources

CVE List CVE-2026-97165
NVD CVE-2026-97165

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