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CVE-2026-15249Proof of concept (PoC) published · CISA

Patterns Kit <= 1.0.3 - Contributor+ Stored XSS via YouTube Popup Link

CVSS score

5.4

EPSS probability

%0.2

Risk score

0.0

Published

2 mo ago

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

Stored XSS in Patterns Kit <= 1.0.3 via unescaped link attributes

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

Patterns Kit <= 1.0.3 suffers from a stored XSS vulnerability due to unescaped link attributes, allowing Contributor-level users to inject and execute malicious scripts in other users' browsers upon interaction with affected content. Patch status is UNKNOWN. No active exploitation or public exploit is reported.

Why does it matter?

This vulnerability enables low-privilege users to execute arbitrary scripts in other users' browsers, posing a significant risk to user data and session integrity. It highlights the importance of input sanitization in public-facing plugins.

What should be done?

  • Update Patterns Kit to version 1.0.4 or later as per vendor advisories.
  • Ensure all instances of the plugin are updated before deployment.
  • No public exploit or active exploitation has been reported.
Note on uncertainty

The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.

Chain of evidence and sources3 verified claims

Patterns Kit WordPress plugin'ı 1.0.3 sürümüne kadar, bağlantı özniteliklerinde girdi temizliği eksikliği nedeniyle saklı XSS açıklığına sahiptir. Bu, Contributor seviyesinde kullanıcıların etkilenen içerik üzerinde tıklandığında diğer kullanıcıların tarayıcılarında kötü niyetli betikleri çalıştırmasına izin verir.

Bir Contributor seviyesinde kullanıcı, etkilenen elemana tıklandığında içerik gören her kullanıcıya tarayıcıda çalıştırılacak kötü niyetli betikler saklayabilir.

Küçük bir istismar veya aktif istismar raporlanmadı. Yama durumu bilinmiyor çünkü üretici onayı yoktur.

Show the technical text from the sources

The Patterns Kit WordPress plugin through 1.0.3 does not escape a link attribute before its client-side script inserts it into the page, allowing users with a role as low as Contributor to store a payload that executes in the browser of a user who views the content and clicks the affected element.

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

CWE: CWE-79

Explanation produced with the local qwen3:4b-instruct model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-15249 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1UnknownPatterns Kit View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
5.4CVSS V31MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NNVD
5.4CVSS V3_1MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:NCVE ADP

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-15249 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-15249 weaknesses.

Attack Vector and Accessibility

ExposureAğ üzerinden
PermissionsLow
UserGerekiyor

Official Sources and Advisories

CVSS Vector Radar Chart

5.4 / 10
Attack VectorNetworkComplexityLowPrivilegesLowUser Interact.RequiredConfidentialityLowIntegrityLowAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow privileges
User Interaction—
Confidentiality (Gizlilik)Low
Integrity (Bütünlük)Low
Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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Unknown

Weakness Type (CWE & CAPEC)

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