Vulnerability record/PUBLISHED/Published Nov 13, 2026 13:00:24 UTC

CVE-2026-121721

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in PublishPress Gutenberg Blocks advanced-gutenberg allows Stored XSS.This issue affects Gutenberg Blocks: from n/a through 3.7.6.

Base score6.5/ 10

SeverityMediumCVSS 3.1

Exploitability / impact

CVSS metric breakdown

Vector-derived attributes

Base severityMedium

Attack vectorNetworkAV

Attack complexityLowAC

Privileges requiredLowPR

User interactionRequiredUI

ScopeChangedS

Confidentiality impactLowC

Integrity impactLowI

Availability impactLowA

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

CVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.

Record context

CVE Numbering AuthorityPatchstack

Last updatedNov 13, 2026 15:52:35 UTC

PublishedNov 13, 2026 13:00:24 UTC

ReservedNov 3, 2026 21:24:31 UTC

Credits

mroccon | Patchstack Bug Bounty Program