GCVE-1988-2026-0314
Vulnerability from gna-1988 – Published: 2026-09-08 18:48 – Updated: 2026-09-09 10:09
VLAI
EPSS
VEX
Title
CVE-2026-52307: Stored XSS in 1CMS v5.6
Summary
CVE-2026-52307: 1CMS v5.6 Authenticated Stored XSS Vulnerability
Vulnerability Description
An authenticated stored cross-site scripting (XSS) vulnerability exists in the Column Management component of ClassCMS
1CMS v5.6. Attackers can execute arbitrary web scripts or HTML by injecting a crafted payload into the title field.
- Vulnerability Type: Cross Site Scripting (XSS)
- Vendor: ClassCMS
- Affected Product: 1CMS v5.6
- Affected Component: Column Management → Article Edit page
- Attack Type: Remote
- Impact: Code Execution (Yes), Information Disclosure (Yes)
Attack Vectors
The vulnerability is remotely exploitable over the network. An authenticated administrator can inject arbitrary
JavaScript into the article title field via the Column Management → Article Edit page. When other users view the
article list or detail page containing the malicious title, the injected script executes in their browsers.
- Attack complexity: Low
- Privileges required: Administrator
Affected Versions
1CMS v5.6 (and possibly earlier versions).
Reproduction Steps
1. Download and install 1CMS v5.6 on a local environment (PHP 5.2–8.4 supported).
2. Complete the installation and log in as an administrator.
3. Navigate to the admin dashboard → Column Management → Article Edit.
4. In the title field, inject the following payload:
<script>alert('XSS')</script>
5. Save the article.
6. View the article list or detail page as any user.
Expected Result
The injected JavaScript (alert('XSS')) executes in the browser of any user viewing the affected page, confirming the
stored XSS vulnerability.
Impact Analysis
- Arbitrary script execution in the victim's browser
- Session hijacking – attackers can steal session cookies
- Information disclosure – sensitive data can be exfiltrated
- Phishing attacks – malicious content can be injected
- Defacement – the CMS appearance can be altered
Remediation
- Upgrade to the latest version of 1CMS if a patch is available
- Implement proper input sanitization and output encoding
- Restrict administrator access to trusted users only
- Consider using Content Security Policy (CSP) headers
CVE ID: CVE-2026-52307
Discovered: 2026-09-03
_______________________________________________
Sent through the Full Disclosure mailing list
https://nmap.org/mailman/listinfo/fulldisclosure
Web Archives & RSS: https://seclists.org/fulldisclosure/
Severity
No CVSS data available.
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuln.freearchive.org/archive/full-disclos… | technical-description |
| https://seclists.org/fulldisclosure/2026/Sep/31 | technical-description |
| https://nmap.org/mailman/listinfo/fulldisclosure | |
| https://seclists.org/fulldisclosure/ |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Cve | CVE-2026-52307 |
Affected:
unknown
|
guessed |
Relationships
reference
GCVE-1988-2026-0314 (this record)
- related CVE-2026-52307
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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