CVE-2026-107396

Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user's browser in the Indico origin. This issue is fixed in version 3.3.13.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18
https://github.com/indico/indico/pull/7619
https://github.com/indico/indico/releases/tag/v3.3.13
https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v

Configurations

No configuration.

History

08 Oct 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-08 20:17

Updated : 2026-10-09 16:17

NVD link : CVE-2026-107396

Mitre link : CVE-2026-107396

CVE.ORG link : CVE-2026-107396

JSON object : View

Products Affected

No product.

CWE

CWE-692

Incomplete Denylist to Cross-Site Scripting

{"id": "CVE-2026-107396", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-107396", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-08T20:23:12.111896Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.7, "exploitabilityScore": 2.3}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "indico", "product": "indico", "versions": [{"status": "affected", "version": "< 3.3.13"}]}]}], "published": "2026-10-08T20:17:34.417", "references": [{"url": "https://github.com/indico/indico/commit/d4c8c7127176efa4cb53c64119ca8ee2b551be18", "source": "security-advisories@github.com"}, {"url": "https://github.com/indico/indico/pull/7619", "source": "security-advisories@github.com"}, {"url": "https://github.com/indico/indico/releases/tag/v3.3.13", "source": "security-advisories@github.com"}, {"url": "https://github.com/indico/indico/security/advisories/GHSA-c4wc-ggrj-jg9v", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-692"}]}], "descriptions": [{"lang": "en", "value": "Indico is an event management system that uses Flask-Multipass, a multi-backend authentication system for Flask. Prior to 3.3.13, users who can manage events or create content, including speakers who can upload material, can store crafted javascript URLs in fields that accept custom URLs. A user who follows one of these URLs can execute attacker-controlled script in the user's browser in the Indico origin. This issue is fixed in version 3.3.13."}], "lastModified": "2026-10-09T16:17:23.047", "sourceIdentifier": "security-advisories@github.com"}