Executive Summary

CVE-2026-4616 is a stored Cross-Site Scripting (XSS) vulnerability found in version 2.6.4-stable of the bolo-solo blogging platform. It affects the article creation functionality at the POST /console/article/ endpoint, specifically the articleTitle parameter.

The vulnerability occurs because the articleTitle parameter is not properly sanitized before being stored in the database. This allows an attacker to embed malicious scripts in the articleTitle field.

When users view the affected article, these malicious scripts execute automatically in their browsers.

An attacker can exploit this by logging into the admin panel, submitting a payload such as `<img src=1 onerror=alert(1)>` in the Title field, and publishing the article. The malicious script then triggers when the article is viewed.

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Impact Analysis

This vulnerability can have several serious impacts:

• Automatic execution of malicious scripts in the browsers of all users who view the affected article.
• Session hijacking through theft of cookies.
• Credential harvesting by displaying fake login forms.
• Unauthorized administrative actions executed in the admin context.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by attempting to submit a malicious payload in the articleTitle parameter at the POST /console/article/ endpoint of the bolo-solo platform. For example, sending a crafted HTTP POST request with a payload such as `<img src=1 onerror=alert(1)>` in the articleTitle field can reveal if the system is vulnerable.'}, {'type': 'paragraph', 'content': 'A proof-of-concept HTTP request example is as follows:'}, {'type': 'list_item', 'content': 'POST /console/article/ HTTP/1.1'}, {'type': 'list_item', 'content': 'Host: localhost:8080'}, {'type': 'list_item', 'content': 'Cookie: solo=[your_session_cookie]'}, {'type': 'list_item', 'content': 'Content-Type: application/x-www-form-urlencoded; charset=UTF-8'}, {'type': 'list_item', 'content': '{"article":{"articleTitle":"<img src=1 onerror=alert(1)>","articleContent":"<img src=1 onerror=alert(1)>\\n\\n\\n","articleAbstract":"<img src=1 onerror=alert(1)>\\n\\n\\n","articleTags":"","articlePermalink":"","articleStatus":0,"articleSignId":"1","postToCommunity":false,"articleCommentable":true,"articleViewPwd":"","category":""}}'}, {'type': 'paragraph', 'content': 'If the payload executes when viewing the article, it confirms the presence of the stored XSS vulnerability.'}] [1]

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Mitigation Strategies

[{'type': 'paragraph', 'content': 'Immediate mitigation steps include sanitizing the articleTitle parameter to prevent malicious scripts from being stored and executed.'}, {'type': 'list_item', 'content': 'Apply HTML escaping functions such as StringEscapeUtils.escapeHtml4(articleTitle) to sanitize input.'}, {'type': 'list_item', 'content': "Implement security headers like Content-Security-Policy with directives such as default-src 'self'; script-src 'self' to restrict script execution."}, {'type': 'list_item', 'content': 'Enable X-XSS-Protection header with value 1; mode=block to help block reflected XSS attacks.'}, {'type': 'paragraph', 'content': 'These steps help prevent the execution of malicious scripts embedded in article titles and reduce the risk of session hijacking, credential theft, and unauthorized administrative actions.'}] [1]

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