Security vulnerabilities and automated fixes for web security issues
15 posts found
A critical security vulnerability in the `/changeData` endpoint allowed any remote attacker to modify user data without authorization. The Express.js route handler accepted requests from any origin and passed user-supplied data directly to the `changeData()` function. The fix implements origin validation using a regex pattern to restrict requests to trusted local sources only.
A critical SQL injection vulnerability was discovered in `sign_up.php` where user registration inputs—including Username and Email—were directly concatenated into SQL queries. Despite using `mysqli_real_escape_string()`, the code remained exploitable. The fix replaces all string-concatenated queries with MySQLi prepared statements and bound parameters, completely eliminating the injection vector.
A critical cross-site scripting (XSS) vulnerability in the sanitize-html library allowed attackers to bypass HTML sanitization through improper handling of the `<xmp>` raw-text element. This vulnerability could enable stored XSS attacks in any Node.js application using sanitize-html versions prior to 2.17.4. The fix involved upgrading the library to properly handle raw-text elements and prevent script injection.
A critical Server-Side Request Forgery vulnerability in `popup.js` allowed attackers to inject malicious URLs from scraped webpages directly into fetch() calls, potentially accessing internal network resources and AWS metadata endpoints. The fix adds URL validation to ensure only HTTP/HTTPS protocols are used and blocks requests to private IP ranges and localhost addresses.
A critical DOM-based Cross-Site Scripting (XSS) vulnerability was discovered in CustomRankingInterface.js where user-imported JSON data containing malicious filter names could execute arbitrary JavaScript in victims' browsers. The fix replaces jQuery's unsafe `.html()` method with the safe `.text()` method, preventing script injection while preserving the intended functionality.
A critical Server-Side Template Injection (SSTI) vulnerability in the banks library (CVE-2026-44209) could allow remote attackers to execute arbitrary code through template processing. The vulnerability was fixed by upgrading from banks 2.4.0 to 2.4.2, which patches the unsafe template handling in request handlers that process user-influenced input.
A high-severity CORS misconfiguration in Hono's middleware (CVE-2026-54290) allowed any origin to be reflected with credentials when the `origin` option defaulted to wildcard. This vulnerability in the studio frontend could enable attackers to steal authenticated user data through cross-origin requests. The fix upgrades Hono from 4.12.21 to 4.12.25, which properly handles CORS origin validation.
A reflected cross-site scripting (XSS) vulnerability was discovered in the similarity search HTML template where user input from the `query` form parameter was rendered directly into an HTML attribute without proper escaping. An attacker could inject malicious JavaScript by crafting a search query containing attribute-breaking payloads like `" onfocus="alert(document.cookie)" autofocus="`, which would execute in the victim's browser.
A medium-severity mass assignment vulnerability was identified in a Ruby on Rails model that lacked proper attribute whitelisting via `attr_accessible` or strong parameters. Without this protection, attackers can manipulate any model attribute through crafted HTTP requests, potentially escalating privileges or corrupting data. The fix enforces explicit attribute allowlisting, closing the door on unauthorized mass assignment exploitation.
A high-severity configuration injection vulnerability was discovered in an HAProxy dashboard where five form fields were written directly into the HAProxy configuration file without any sanitization. An attacker could exploit this by injecting newline characters and arbitrary HAProxy directives, effectively rewriting load balancer rules, adding unauthorized backends, or bypassing access controls. The fix introduces a sanitization layer that strips non-printable characters from all user-supplied
A low-severity Cross-Site Scripting (XSS) vulnerability was identified in `agent_chat.js`, where user-controlled data was being passed directly into DOM manipulation methods like `innerHTML`. While rated low severity, XSS vulnerabilities can be chained with other attacks to steal session tokens, redirect users, or execute arbitrary scripts in a victim's browser. The fix eliminates the unsafe pattern by replacing direct HTML injection with safer DOM manipulation techniques.
A cross-site scripting (XSS) vulnerability was discovered and patched in a Go-based application where the `text/template` package was being used instead of the safer `html/template` package for rendering HTML content. This single-line fix — swapping one import — prevents user-controlled data from being injected as raw HTML, closing a potential attack vector for malicious script injection. While rated low severity, XSS vulnerabilities are among the most common and exploitable web security issues,