CVE-2026-28141 Details.
NextGEN Gallery <= 4.2.3 - Reflected Cross-Site Scripting
Atlas does not check this one. Works by exploiting the flaw.
The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check.
About CVE-2026-28141. What It Means.
NextGEN Gallery through 4.2.3 reflects a URL-decoded `ngg_tag` route value into the generated tag page without the context-specific escaping added in 4.2.4. An unauthenticated attacker can break out of the tag context and inject an auto-executing script. This template injects an `svg onload` payload carrying a random nonce and matches its unencoded reflection; slash and backtick syntax keep the request off common WAF signatures.
Affected Product. What Is Hit.
- Vendor
- imagely
- Product
- Imagely NextGEN Gallery
FAQ
Common Questions.
NextGEN Gallery <= 4.2.3 - Reflected Cross-Site Scripting. NextGEN Gallery through 4.2.3 reflects a URL-decoded `ngg_tag` route value into the generated tag page without the context-specific escaping added in 4.2.4. An unauthenticated attacker can break out of the tag context and inject an auto-executing script. This template injects an `svg onload` payload carrying a random nonce and matches its unencoded reflection; slash and backtick syntax keep the request off common WAF signatures.
No. The only reliable test for this one is to try the weakness itself, which can disturb the site. Atlas does not do that, so it does not run this check. The facts about CVE-2026-28141 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-28141 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Imagely NextGEN Gallery to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-28141. Atlas does not run a check for it, so nothing here says whether a particular site is affected.