CVE-2026-14449 - Vulnerability Details - OpenCVE

Description

u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components

Published: 2026-07-02

Score: 6.4 Medium

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

u5CMS

u5CMS

unaffected

Version	Status	Constraints
`0`	affected	≤ 12.8.8

No data.

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction Active

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/u5cms/u5cms/releases/tag/v12.8.9

History

Thu, 02 Jul 2026 14:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-79
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 02 Jul 2026 12:15:00 +0000

Type	Values Removed	Values Added
Description		u5CMS through v12.8.8 is vulnerable to reflected XSS via the ‘thanks’ parameter in multiple form components
Title		POST-based reflected XSS via the thanks parameter in form components
References		https://github.com/u5cms/u5cms/releases/tag/v12.8.9
Metrics		cvssV4_0 `{'score': 6.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published: 2026-07-02T11:47:53.387Z

Updated: 2026-07-02T13:14:25.969Z

Reserved: 2026-07-02T07:19:55.068Z

Link: CVE-2026-14449

Vulnrichment

Updated: 2026-07-02T13:14:22.840Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-79

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-14449", "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c", "state": "PUBLISHED", "assignerShortName": "NCSC.ch", "dateReserved": "2026-07-02T07:19:55.068Z", "datePublished": "2026-07-02T11:47:53.387Z", "dateUpdated": "2026-07-02T13:14:25.969Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "455daabc-a392-441d-aa46-37d35189897c", "shortName": "NCSC.ch", "dateUpdated": "2026-07-02T11:47:53.387Z"}, "title": "POST-based reflected XSS via the thanks parameter in form components", "affected": [{"vendor": "u5CMS", "product": "u5CMS", "versions": [{"status": "affected", "version": "0", "lessThanOrEqual": "12.8.8", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "u5CMS\u00a0through\u00a0v12.8.8 is vulnerable to reflected XSS via the \u2018thanks\u2019 parameter in multiple form components", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div><p><span>u5CMS </span>through v12.8.8 is vulnerable to reflected XSS via the \u2018thanks\u2019 parameter in multiple form components</p></div>"}]}], "references": [{"url": "https://github.com/u5cms/u5cms/releases/tag/v12.8.9"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 6.4, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H"}}], "credits": [{"lang": "en", "value": "Pierre-Yves Guerder", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-79", "lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-02T13:14:15.967119Z", "id": "CVE-2026-14449", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-02T13:14:25.969Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-14449", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-02T13:14:15.967119Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-02T13:14:22.840Z"}}], "cna": {"title": "POST-based reflected XSS via the thanks parameter in form components", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Pierre-Yves Guerder"}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.4, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:H/SI:H/SA:H", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "ACTIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "u5CMS", "product": "u5CMS", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThanOrEqual": "12.8.8"}], "defaultStatus": "unaffected"}], "references": [{"url": "https://github.com/u5cms/u5cms/releases/tag/v12.8.9"}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "u5CMS\u00a0through\u00a0v12.8.8 is vulnerable to reflected XSS via the \u2018thanks\u2019 parameter in multiple form components", "supportingMedia": [{"type": "text/html", "value": "<div><p><span>u5CMS </span>through v12.8.8 is vulnerable to reflected XSS via the \u2018thanks\u2019 parameter in multiple form components</p></div>", "base64": false}]}], "providerMetadata": {"orgId": "455daabc-a392-441d-aa46-37d35189897c", "shortName": "NCSC.ch", "dateUpdated": "2026-07-02T11:47:53.387Z"}}}, "cveMetadata": {"cveId": "CVE-2026-14449", "state": "PUBLISHED", "dateUpdated": "2026-07-02T13:14:25.969Z", "dateReserved": "2026-07-02T07:19:55.068Z", "assignerOrgId": "455daabc-a392-441d-aa46-37d35189897c", "datePublished": "2026-07-02T11:47:53.387Z", "assignerShortName": "NCSC.ch"}, "dataVersion": "5.2"}