CVE-2021-24126: Envira Gallery Lite < 1.8.3.3 - Authenticated Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2021-03-18 · updated 2026-06-17
Weakness: CWE-79

Description

Unvalidated input and lack of output encoding in the Envira Gallery Lite WordPress plugin, versions before 1.8.3.3, did not properly sanitise the images metadata (namely title) before outputting them in the generated gallery, which could lead to privilege escalation.

Affected products

smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More: before 1.8.3.3 — fixed in 1.8.3.3

How to fix

Upgrade to a fixed version: smub Envira Gallery – Image Photo Gallery, Albums, Video Gallery, Slideshows & More 1.8.3.3. Check the vendor advisory for mitigations.

References

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