CVE-2008-1476 in Serendipity
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Serendipity (S9Y) before 1.3 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to received trackbacks.
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Analysis
by VulDB Data Team • 08/07/2019
The CVE-2008-1476 vulnerability represents a critical cross-site scripting flaw discovered in Serendipity (S9Y) blogging platform versions prior to 1.3. This vulnerability specifically targets the trackback handling mechanism within the blogging software, creating a pathway for remote attackers to execute malicious scripts in the context of other users' browsers. The vulnerability stems from insufficient input validation and sanitization of trackback data received by the blogging platform, allowing attackers to inject arbitrary HTML and JavaScript code through the trackback submission process.
The technical implementation of this vulnerability involves the improper handling of user-supplied data within the trackback functionality of Serendipity. When the platform receives trackback information from external sources, it fails to adequately sanitize or escape the input before displaying it on the blog interface. This omission creates an environment where malicious actors can craft trackback messages containing embedded scripts that execute when other users view the affected blog posts or trackback listings. The vulnerability manifests as a classic reflected XSS attack vector, where the malicious payload is reflected back to users through the blog's display mechanisms without proper security controls.
The operational impact of CVE-2008-1476 extends beyond simple script injection, potentially enabling attackers to perform various malicious activities including session hijacking, credential theft, and defacement of the affected blog. Attackers could exploit this vulnerability to steal cookies from authenticated users, redirect them to malicious sites, or inject content that could compromise the integrity of the blog. The vulnerability particularly affects blog administrators and readers who may unknowingly interact with compromised trackback entries, making it a significant threat to blog security and user privacy. This issue aligns with CWE-79 which categorizes cross-site scripting vulnerabilities as a fundamental web application security weakness.
Security professionals should note that this vulnerability demonstrates the critical importance of input validation and output encoding in web applications, particularly those handling user-generated content. The flaw exemplifies the ATT&CK technique T1566.001 which involves the exploitation of web applications through injection attacks. Organizations using Serendipity versions prior to 1.3 should immediately implement patches to address the vulnerability, as the risk of exploitation remains high given the prevalence of such platforms and the relatively simple nature of the attack vector. Additionally, implementing proper content security policies and input sanitization measures would provide additional defense-in-depth protection against similar vulnerabilities in the future.