🚨 CVE-2026-66046
Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.
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Expat through 2.8.3 contains a denial of service vulnerability caused by quadratic algorithmic complexity in the storeAtts() function in xmlparse.c, where processing N specified attributes with non-normalized values triggers an O(N^2) linear scan of elementType->defaultAtts to determine CDATA status. A remote unauthenticated attacker can supply a single well-formed XML document of a few megabytes to an application parsing untrusted XML to cause excessive CPU consumption, resulting in denial of service without requiring authentication, external entity resolution, or non-default parser options.
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GitHub
[CVE-2026-66046] lib: Migrate `.isCdata` lookup from a linear loop to a hash table lookup by hartwork · Pull Request #1321 · l…
Everything after the next line is the original report Markdown…
Quadratic CPU Complexity in storeAtts() isCdata Attribute Default Lookup
Package: libexpat/libexpat
Tested Versions: 2.8.2 / master ...
Quadratic CPU Complexity in storeAtts() isCdata Attribute Default Lookup
Package: libexpat/libexpat
Tested Versions: 2.8.2 / master ...
🚨 CVE-2026-66621
Unauthenticated Cross Site Scripting (XSS) in Ultimate Dashboard <= 3.11.2 versions.
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Unauthenticated Cross Site Scripting (XSS) in Ultimate Dashboard <= 3.11.2 versions.
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Cross Site Scripting (XSS) in WordPress Ultimate Dashboard Plugin
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🚨 CVE-2026-66633
Unauthenticated Cross Site Scripting (XSS) in Fluent Forms Pro Add On Pack < 6.2.12 versions.
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Unauthenticated Cross Site Scripting (XSS) in Fluent Forms Pro Add On Pack < 6.2.12 versions.
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Cross Site Scripting (XSS) in WordPress Fluent Forms Pro Add On Pack Plugin
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🚨 CVE-2026-66634
Subscriber Insecure Direct Object References (IDOR) in Modal Survey <= 2.0.2.2.3 versions.
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Subscriber Insecure Direct Object References (IDOR) in Modal Survey <= 2.0.2.2.3 versions.
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Patchstack
Insecure Direct Object References (IDOR) in WordPress Modal Survey Plugin
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🚨 CVE-2026-66635
Unauthenticated Cross Site Request Forgery (CSRF) in Slider by 10Web <= 1.2.62 versions.
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Unauthenticated Cross Site Request Forgery (CSRF) in Slider by 10Web <= 1.2.62 versions.
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Patchstack
Cross Site Request Forgery (CSRF) in WordPress Slider by 10Web Plugin
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🚨 CVE-2026-66637
Contributor Cross Site Scripting (XSS) in Featured Video Plus <= 2.3.3 versions.
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Contributor Cross Site Scripting (XSS) in Featured Video Plus <= 2.3.3 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress Featured Video Plus Plugin
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🚨 CVE-2026-66638
Contributor Cross Site Scripting (XSS) in Frontend Admin by DynamiApps <= 3.29.10 versions.
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Contributor Cross Site Scripting (XSS) in Frontend Admin by DynamiApps <= 3.29.10 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress Frontend Admin by DynamiApps Plugin
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🚨 CVE-2026-66639
Contributor Cross Site Scripting (XSS) in WPZOOM Forms – Contact Form Plugin for Gutenberg <= 2.0.4 versions.
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Contributor Cross Site Scripting (XSS) in WPZOOM Forms – Contact Form Plugin for Gutenberg <= 2.0.4 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress WPZOOM Forms – Contact Form Plugin for Gutenberg Plugin
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🚨 CVE-2026-66640
Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.
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Contributor Cross Site Scripting (XSS) in Login With Ajax <= 4.5.1 versions.
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Cross Site Scripting (XSS) in WordPress Login With Ajax Plugin
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🚨 CVE-2026-66641
Contributor Cross Site Scripting (XSS) in Video Conferencing with Zoom <= 4.6.8 versions.
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Contributor Cross Site Scripting (XSS) in Video Conferencing with Zoom <= 4.6.8 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress Video Conferencing with Zoom Plugin
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🚨 CVE-2026-66643
Contributor Cross Site Scripting (XSS) in Wufoo Shortcode <= 1.55 versions.
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Contributor Cross Site Scripting (XSS) in Wufoo Shortcode <= 1.55 versions.
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Cross Site Scripting (XSS) in WordPress Wufoo Shortcode Plugin
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🚨 CVE-2026-66644
Contributor Cross Site Scripting (XSS) in Typing Effect <= 1.3.7 versions.
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Contributor Cross Site Scripting (XSS) in Typing Effect <= 1.3.7 versions.
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Cross Site Scripting (XSS) in WordPress Typing Effect Plugin
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🚨 CVE-2026-66645
Contributor Cross Site Scripting (XSS) in Table Of Contents Block <= 1.5.0 versions.
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Contributor Cross Site Scripting (XSS) in Table Of Contents Block <= 1.5.0 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress Table Of Contents Block Plugin
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🚨 CVE-2026-66646
Contributor Cross Site Scripting (XSS) in WP Tab Widget <= 1.2.11 versions.
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Contributor Cross Site Scripting (XSS) in WP Tab Widget <= 1.2.11 versions.
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Cross Site Scripting (XSS) in WordPress WP Tab Widget Plugin
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🚨 CVE-2026-66651
Unauthenticated Broken Access Control in MultiVendorX <= 5.0.14 versions.
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Unauthenticated Broken Access Control in MultiVendorX <= 5.0.14 versions.
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Patchstack
Broken Access Control in WordPress MultiVendorX Plugin
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🚨 CVE-2026-66667
Unauthenticated Cross Site Scripting (XSS) in Templately <= 3.7.1 versions.
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Unauthenticated Cross Site Scripting (XSS) in Templately <= 3.7.1 versions.
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Patchstack
Cross Site Scripting (XSS) in WordPress Templately Plugin
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🚨 CVE-2026-66679
Unauthenticated Broken Access Control in Appointment Hour Booking <= 1.5.91 versions.
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Unauthenticated Broken Access Control in Appointment Hour Booking <= 1.5.91 versions.
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Broken Access Control in WordPress Appointment Hour Booking Plugin
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