CVE-2026-11434
FluentCMS Blocks Plugin blocks cross site scripting
Description
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.
INFO
Published Date :
June 6, 2026, 3:16 p.m.
Last Modified :
July 23, 2026, 7:10 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update FluentCMS to the latest version.
- Apply security patches for Blocks Plugin.
- Validate and sanitize all user inputs.
- Avoid using user input directly in output.
Public PoC/Exploit Available at Github
CVE-2026-11434 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-11434.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-11434 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-11434
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVEs, PoCs, Payloads, CTFs and Bug Bounty
HTML
Vulnerability Research Group
README.md profile.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-11434 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-11434 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Jul. 23, 2026
Action Type Old Value New Value Added Translation Title: FluentCMS, Description: Se ha identificado una debilidad en FluentCMS 0.0.5. El elemento afectado es una función desconocida del archivo /admin/blocks del componente Blocks Plugin. Esta manipulación causa cross site scripting. El ataque puede ser iniciado remotamente. El exploit ha sido puesto a disposición del público y podría ser usado para ataques. El proveedor fue contactado tempranamente sobre esta divulgación pero no respondió de ninguna manera. -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:fluentcms:fluentcms:*:*:*:*:*:*:*:*'], 'vendor': 'n/a', 'modules': ['Blocks Plugin'], 'product': 'FluentCMS', 'versions': [{'status': 'affected', 'version': '0.0.5'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-11434', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-08T15:38:46.006779Z'} -
CVE Modified by [email protected]
Jun. 10, 2026
Action Type Old Value New Value Added Reference https://karinagante.github.io/cve-2026-11434/ Added Reference https://karinagante.github.io/cve-2026-11434/#proof-of-concept-poc -
New CVE Received by [email protected]
Jun. 06, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N Added CVSS V2 (AV:N/AC:L/Au:M/C:N/I:P/A:N) Added CWE CWE-79 Added CWE CWE-94 Added Reference https://hackmd.io/@noka/BkHdIMFAWx Added Reference https://vuldb.com/cve/CVE-2026-11434 Added Reference https://vuldb.com/submit/821094 Added Reference https://vuldb.com/vuln/369014 Added Reference https://vuldb.com/vuln/369014/cti