[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fneBAg_Xlp7bfVdY_GljK23nwrRXrvxfCNPbzTXq3qxU":3,"g5a-risk:CVE-2021-43818":276},{"success":4,"data":5,"meta":274},true,{"cveId":6,"title":7,"description":8,"shortDescription":9,"publishedDate":10,"lastModified":11,"cvssScore":12,"cvssVector":13,"cvssMetrics":14,"epssScore":47,"epssPercentile":27,"epssTimeSeries":48,"severity":49,"affectedProducts":50,"affectedProductsCount":112,"references":113,"referencesCount":165,"weaknesses":166,"weaknessesCount":182,"isActivelyExploited":183,"cisaInfo":27,"otxData":27,"relatedBlogPosts":184,"seoMetadata":185,"configurations":210,"relatedVendorCves":272,"notableEvents":273},"CVE-2021-43818","What is CVE-2021-43818?","lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script content pass through, as well as script content in SVG files embedded using data URIs. Users that employ the HTML cleaner in a security relevant context should upgrade to lxml 4.6.5 to receive a patch. There are no known workarounds available.","lxml is a library for processing XML and HTML in the Python language. Prior to version 4.6.5, the HTML Cleaner in lxml.html lets certain crafted script 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Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.","Software or other automated logic has certain assumptions about what constitutes data and control respectively. It is the lack of verification of these assumptions for user-controlled input that leads to injection problems. Injection problems encompass a wide variety of issues -- all mitigated in very different ways and usually attempted in order to alter the control flow of the process. For this reason, the most effective way to discuss these weaknesses is to note the distinct features that classify them as injection weaknesses. The most important issue to note is that all injection problems share one thing in common -- i.e., they allow for the injection of control plane data into the user-controlled data plane. This means that the execution of the process may be altered by sending code in through legitimate data channels, using no other mechanism. While buffer overflows, and many other flaws, involve the use of some further issue to gain execution, injection problems need only for the data to be parsed.","Incomplete","Class","Simple",{"id":176,"name":177,"description":178,"extendedDescription":179,"status":180,"abstraction":181,"structure":174},"CWE-79","Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","Cross-site scripting (XSS) vulnerabilities occur when:\nThere are three main kinds of XSS:\nOnce the malicious script is injected, the attacker can perform a variety of malicious activities. The attacker could transfer private information, such as cookies that may include session information, from the victim's machine to the attacker. The attacker could send malicious requests to a web site on behalf of the victim, which could be especially dangerous to the site if the victim has administrator privileges to manage that site. Phishing attacks could be used to emulate trusted web sites and trick the victim into entering a password, allowing the attacker to compromise the victim's account on that web site. Finally, the script could exploit a vulnerability in the web browser itself possibly taking over the victim's machine, sometimes referred to as \"drive-by hacking.\"\nIn many cases, the attack can be launched without the victim even being aware of it. Even with careful users, attackers frequently use a variety of methods to encode the malicious portion of the attack, such as URL encoding or Unicode, so the request looks less suspicious.","Stable","Base",2,false,[],{"title":186,"metaDescription":187,"keywords":188,"canonicalUrl":189,"structuredData":190},"What is CVE-2021-43818? Vulnerability Analysis | Security Advisory | Precursor Intelligence","Comprehensive analysis of CVE-2021-43818, a high severity cyber security vulnerability from 2021. lxml is a library for processing XML and HTML in the Python...","CVE-2021-43818, CVE-2021-43818 vulnerability, CVE-2021-43818 security, high severity vulnerability, cybersecurity, vulnerability analysis, security advisory, CVE database, threat intelligence, security research, vulnerability assessment, cyber threats, 2021, CVSS score, exploit, patch, remediation, lxml security, fedoraproject security, debian security, netapp security, lxml vulnerability, fedora vulnerability, debian_linux vulnerability, solidfire 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