CVE-2026-2602Public exploitNetwork attack vector

Stored XSS via unescaped featured image width

Published Mar 29, 2026 · Updated Mar 29, 2026

Stored XSS in Twentig 1.9.7 and earlier allows remote authenticated users to inject scripts through featured-image block widths. The twentig_filter_post_featured_image_block render filter places the featuredImageSizeWidth attribute into an HTML style value without validation or escaping. Contributor-level access is required; viewing a crafted page executes the stored script in the visitor's browser context.

CVSS severity6.4
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Twentig 1.9.7 and earlier allows remote authenticated users to inject scripts through featured-image block widths. The twentig_filter_post_featured_image_block render filter places the featuredImageSizeWidth attribute into an HTML style value without validation or escaping. Contributor-level access is required; viewing a crafted page executes the stored script in the visitor's browser context.

The record

CVE
CVE-2026-2602
Published
Mar 29, 2026
Updated
Mar 29, 2026
Vendor
Twentig
Product
Twentig
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <=1.9.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Twentig · Twentigversion=* <=1.9.7

Published CVSS scores

6.4WordfenceCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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