CVE-2026-66434 Cross-site scripting in Photonic Gallery & Lightbox for Flickr, SmugMug & Others
A contributor can inject malicious scripts into the Photonic Gallery plugin, potentially compromising user sessions or site integrity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-66434?
CVE-2026-66434 is a medium-severity cross-site scripting vulnerability in Sayontan Sinha Photonic Gallery & Lightbox for Flickr, SmugMug & Others, published on 27 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Contributor Cross Site Scripting (XSS) in Photonic Gallery & Lightbox for Flickr, SmugMug & Others <= 3.33 versions.
Weakness: CWE-79
Which versions are affected by CVE-2026-66434?
How do I fix CVE-2026-66434?
No fix has been published for CVE-2026-66434 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-66434 being exploited?
There is no known exploitation of CVE-2026-66434 in the wild and no public exploit code.
Sources
Also known as GHSA-94w5-q7f9-fhrx.