CVE-2026-11434
FluentCMS Blocks Plugin blocks cross site scripting
Vexday Risk Score
33Attention
SSVC decision (CISA)
Attend
PoC available → attend closely
CVSS 4.8EPSS 0.3%KEV nãoPoC públicaNuclei —Metasploit —Patch —
Lifecycle
06 Jun 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
A weakness has been identified in FluentCMS 0.0.5. The impacted element is an unknown function of the file /admin/blocks of the component Blocks Plugin. This manipulation causes cross site scripting. The attack may be initiated remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
Affected products
n/a · FluentCMSpublic PoCs found — 1
cve_referencekarinagante.github.io/cve-2026-11434/#proof-of-concept-pocunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.