What is the CVSS score of CVE-2026-26223?

CVE-2026-26223 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Spip are affected by CVE-2026-26223?

Organizations using SPIP before 4.4.8 should be aware of moderate risk from CVE-2026-26223, a cross-site scripting vulnerability rated CVSS 6.1.

How to fix or mitigate CVE-2026-26223?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Spip CVE-2026-26223

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-19 disclosure@vulncheck.com

XSS Spip

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:03 vuln.today

CVE Published

Feb 19, 2026 - 16:27 nvd

MEDIUM 6.1

DescriptionCVE.org

SPIP before 4.4.8 allows cross-site scripting (XSS) in the private area via malicious iframe tags. The application does not properly sandbox or escape iframe content in the back-office, allowing an attacker to inject and execute malicious scripts. The fix adds a sandbox attribute to iframe tags in the private area. This vulnerability is not mitigated by the SPIP security screen.

AnalysisAI

Improper iframe sanitization in SPIP before 4.4.8 enables stored cross-site scripting attacks within the private administrative area, allowing attackers to execute arbitrary JavaScript in the context of backend users. An unauthenticated attacker can inject malicious iframe tags that bypass the application's security filters and execute in victims' browsers when they access the affected area. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.1 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. …

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CVE-2026-26223 vulnerability details – vuln.today

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