What is the CVSS score of CVE-2026-1827?

CVE-2026-1827 has a CVSS 3.1 base score of 6.4 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Flask are affected by CVE-2026-1827?

Organizations using all should be aware of moderate risk from CVE-2026-1827, a cross-site scripting vulnerability rated CVSS 6.4.

Flask CVE-2026-1827

MEDIUM

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

2026-02-11 security@wordfence.com

WordPress Flask XSS

6.4

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.4 MEDIUM

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:02 vuln.today

CVE Published

Feb 11, 2026 - 09:15 nvd

MEDIUM 6.4

DescriptionCVE.org

The Flask Micro code-editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's codeflask shortcode in all versions up to, and including, 1.0.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

AnalysisAI

The Flask Micro code-editor plugin for WordPress through version 1.0.0 contains a stored cross-site scripting vulnerability in its codeflask shortcode due to inadequate input validation and output encoding. Authenticated users with contributor-level permissions or higher can inject malicious scripts that execute for all visitors accessing affected pages. …

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Vulnerability AssessmentAI

Risk Assessment	CVSS 6.4 (MEDIUM). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires contributor-level access) 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 running all and apply vendor patches as part of regular patch cycle. …

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CVE-2026-1827 vulnerability details – vuln.today

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