Leaflet - Moderately critical - Cross site scripting - SA-CONTRIB-2026-204

published 2026-10-07 33 d ago modified 2026-10-30 9 d ago also DRUPAL-CONTRIB-2026-204 , EUVD-2026-113571

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Leaflet allows Stored XSS. This issue affects Leaflet versions: from 0.0.0 to 10.4.13.

Patch / fix

fixed in 2

packagist drupal/leaflet 10.4.13
Drupal Leaflet 10.4.13

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 9 d ago (2026-10-30)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

Affected packages

ecosystem	package	affected	fixed in
packagist	drupal/leaflet	<10.4.13	10.4.13

Affected products

Drupal Leaflet

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

drupal.org /sa-contrib-2026-204
web

Sources

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