Cotonti CMS Comments Plugin PHP Object Injection via Unrestricted unserialize() in Create/Edit Actions
CVSS score
7.7
EPSS probability
%0.4
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
1
Source agreement
Tam uyum
Evidence confidence
%50
Short explanation
CVE-2026-71294 reveals a PHP Object Injection vulnerability in Cotonti CMS' Comments plugin, allowing authenticated users with write access to trigger unauthorized database insertions via a POP-chain. No official patch is known. Vulnerability is present in all Cotonti versions from 0 to *.
This vulnerability enables direct database manipulation by attackers, posing a high risk of data compromise. The absence of a confirmed patch increases exposure, especially in environments with public-facing comment sections. It highlights the danger of unbounded object deserialization in CMS plugins.
What should be done?
- Apply vendor-published patch (status UNKNOWN)
- Disable or remove the Comments plugin until a fix is available
- Ensure no unrestricted unserialize() calls in user input handling
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
CVE-2026-71294, Cotonti CMS' Yorum Eklentisi'nde PHP Nesne İstismarı açıklaması, kullanıcıdan gelen verilerin sınırsız sınıflarla başlatılabilen unserialize() ile deserializasyonu içerdiği için, saldırıcının zararlı nesne oluşturup, yıkıcı nesne yıkım zincirlerini tetikleyebilmesini sağlar.
Bu açıklamaya yazma erişimi olan kullanıcılar erişebilir; MySQL_cache sınıfı kullanılarak gerçek bir istismar gösterilmiştir ve bu, veritabanına izin verilmeyen girdilerle INSERT sorgusu tetikler.
Yama durumu bilinmiyor çünkü resmî kaynaklarda yama veya düzeltme sürümü bulunmamaktadır ve resmi bir giderme belirtisi doğrulanmamıştır.
Show the technical text from the sources
Cotonti CMS's Comments plugin deserializes user-supplied data without restricting the classes that may be instantiated. In plugins/comments/controllers/actions/CreateAction.php, a POST parameter obtained via (trim-only sanitization) is passed to with no restriction, reachable by any member with write access to comments (the default setting in plugins/comments/comments.setup.php).
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
CWE: CWE-502
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-2026-71294 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Cotonti | Cotonti | 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 |
|---|---|---|---|---|
| 7.7 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L | CVE CNA |
| 7.6 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L | NVD |
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-2026-71294 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-2026-71294 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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Get this vulnerability through the API
Affected products, version ranges, exploitation status and patch information in a single request, with a free key.
curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-71294"