PostX <= 5.0.13 - Authenticated (Contributor+) Stored Cross-Site Scripting via Post Comments Block
CVSS score
6.4
EPSS probability
%0.3
Risk score
0.0
Published
2 mo ago
Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%58
Short explanation
The PostX plugin for WordPress (versions 0 to 5.0.13) is vulnerable to authenticated stored cross-site scripting via the 'inputPlaceHolder' parameter. An attacker with Contributor-level access or higher can inject and execute scripts in user-accessible pages. CVSS score is 6.4 (MEDIUM). Patch status is UNKNOWN. No fixed version is publicly documented.
This vulnerability enables authenticated attackers to inject and execute malicious scripts on user-accessible pages, posing a risk to user data and site integrity. It requires immediate attention for sites using PostX plugin versions up to 5.0.13.
What should be done?
- Upgrade to a version beyond 5.0.13 if available; otherwise, follow vendor advisories for mitigation
- Ensure input sanitization and output escaping in affected components
The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.
Chain of evidence and sources
WordPress'te PostX eklemesi, 5.0.13 sürümüne kadar olan tüm sürümlerde 'inputPlaceHolder' parametresi nedeniyle kimlik doğrulaması yapılmış saklı cross-site scripting (XSS) hatası mevcuttur. Bu, girdi temizleme ve çıktı kaçırma eksikliği nedeniyledir.
Contributor seviyesinde veya üzeri erişim sahibi kimlik doğrulamış bir saldırıcının, kullanıcıların bu sayfaları eriştiğinde çalıştırılacak herhangi bir web betiği yerleştirme yetkisi vardır.
Hata, CVSS 3.1 puanı 6.4 (ORTA) ve AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N vektörüyle ifade edilir; bu, erişim yükseltme riskinin düşük olduğunu, ancak istemci tarafında kod çalıştırma olasılığını gösterir.
Show the technical text from the sources
The Post Grid Gutenberg Blocks for News, Magazines, Blog Websites – PostX plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'inputPlaceHolder' parameter in all versions up to, and including, 5.0.13 due to insufficient input sanitization and output escaping. 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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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-2026-5158 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | wpxpo | Post Grid Gutenberg Blocks – PostX | View |
RED HAT CSAF/VEX: Product Impact Check
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.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 6.4 | CVSS V31 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | NVD |
| 6.4 | CVSS V3_1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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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-2026-5158 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-2026-5158 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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