Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
6 results
Oct 15, 2026HtmlUnit Neko is an HtmlUnit adaptation of NekoHTML.CVE-2026-104828 · Other software · HtmlUnit · reported by GitHubHigh 7.2
HtmlUnit Neko is an HtmlUnit adaptation of NekoHTML. Prior to 5.4.0, HTMLWriterFilter writes decoded TEXTAREA and TITLE character content without entity encoding because both elements are treated as special content. During a parse-and-serialize round trip, entity references inside these escapable raw-text elements are decoded by the parser and then emitted as raw markup by printCharacters(), changing the document's semantics. Applications that use htmlunit-neko in an HTML sanitizer, content filter, or other parse-transform-serialize pipeline can therefore turn attacker-controlled encoded text into executable markup when the output is rendered by a browser. This issue is fixed in version 5.4.0.
- Product
- htmlunit-neko
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Dec 4, 2023HtmlUnit is a GUI-less browser for Java programs.CVE-2023-49093 · Other software · HtmlUnit · reported by GitHubCritical 9.8
HtmlUnit is a GUI-less browser for Java programs. HtmlUnit is vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attacker’s webpage. This vulnerability has been patched in version 3.9.0
- Product
- htmlunit
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comhtmlunit.org
May 25, 2023Those using HtmlUnit to browse untrusted webpages may be vulnerable to Denial of service attacks (DoS).CVE-2023-2798 · Other software · Htmlunit · reported by cve-coordination@google.comHigh 7.5
Those using HtmlUnit to browse untrusted webpages may be vulnerable to Denial of service attacks (DoS). If HtmlUnit is running on user supplied web pages, an attacker may supply content that causes HtmlUnit to crash by a stack overflow. This effect may support a denial of service attack.This issue affects htmlunit before 2.70.0.
- Product
- Htmlunit
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordbugs.chromium.orggithub.com
Apr 3, 2023Versions of the package net.sourceforge.htmlunit:htmlunit from 0 and before 3.0.0 are vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attaCVE-2023-26119 · Other software · Htmlunit · reported by report@snyk.ioCritical 9.8
Versions of the package net.sourceforge.htmlunit:htmlunit from 0 and before 3.0.0 are vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attacker’s webpage.
- Product
- Htmlunit
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comsecurity.snyk.io
Apr 24, 2022HtmlUnit NekoHtml Parser before 2.61.0 suffers from a denial of service vulnerability.CVE-2022-29546 · Other software · Htmlunit · reported by MITREHigh 7.5
HtmlUnit NekoHtml Parser before 2.61.0 suffers from a denial of service vulnerability. Crafted input associated with the parsing of Processing Instruction (PI) data leads to heap memory consumption. This is similar to CVE-2022-28366 but affects a much later version of the product.
- Product
- Htmlunit
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 11, 2020HtmlUnit prior to 2.37.0 contains code execution vulnerabilities.CVE-2020-5529 · Other software · HtmlUnit Project · reported by vultures@jpcert.or.jpHigh 8.1
HtmlUnit prior to 2.37.0 contains code execution vulnerabilities. HtmlUnit initializes Rhino engine improperly, hence a malicious JavScript code can execute arbitrary Java code on the application. Moreover, when embedded in Android application, Android-specific initialization of Rhino engine is done in an improper way, hence a malicious JavaScript code can execute arbitrary Java code on the application.
- Product
- HtmlUnit
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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