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| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2026-33889 | 1 Apostrophecms | 1 Apostrophecms | 2026-04-20 | 5.4 Medium |
| ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a stored cross-site scripting vulnerability in the @apostrophecms/color-field module, where color values prefixed with -- bypass TinyColor validation intended for CSS custom properties, and the launder.string() call performs only type coercion without stripping HTML metacharacters. These unsanitized values are then concatenated directly into <style> tags both in per-widget style elements rendered for all visitors and in the global stylesheet rendered for editors, with the output marked as safe HTML. An editor can inject a value which closes the style tag and executes arbitrary JavaScript in the browser of every visitor to any page containing the affected widget. This enables mass session hijacking, cookie theft, and privilege escalation to administrative control if an admin views draft content. This issue has been fixed in version 4.29.0. | ||||
| CVE-2025-6430 | 2 Mozilla, Redhat | 8 Firefox, Firefox Esr, Enterprise Linux and 5 more | 2026-04-20 | 6.1 Medium |
| When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12. | ||||
| CVE-2026-4420 | 1 Bludit | 1 Bludit | 2026-04-20 | 5.4 Medium |
| Bludit is vulnerable to Stored Cross-Site Scripting (XSS) in its page creating functionality. An authenticated attacker with page creation privileges (such as Author, Editor, or Administrator) can embed a malicious JavaScript payload in the tags field of a newly created article. This payload will be executed when a victim visits the URL of the uploaded resource. The uploaded resource itself is accessible without authentication. Critically, this vulnerability could be used to automatically create a new site administrator if the victim has enough privileges. The vendor was notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Only versions 3.17.2 and 3.18.0 were tested and confirmed as vulnerable, other versions were not tested and might also be vulnerable. | ||||
| CVE-2025-40891 | 2 Nozomi Networks, Nozominetworks | 4 Cmc, Guardian, Cmc and 1 more | 2026-04-20 | 4.7 Medium |
| A Stored HTML Injection vulnerability was discovered in the Time Machine Snapshot Diff functionality due to improper validation of network traffic data. An unauthenticated attacker can send specially crafted network packets at two different times to inject HTML tags into asset attributes across two snapshots. Exploitation requires a victim to use the Time Machine Snapshot Diff feature on those specific snapshots and perform specific GUI actions, at which point the injected HTML renders in their browser, enabling phishing and open redirect attacks. Full XSS exploitation is prevented by input validation and Content Security Policy. Attack complexity is high due to multiple required conditions. | ||||
| CVE-2025-40893 | 2 Nozomi Networks, Nozominetworks | 4 Cmc, Guardian, Cmc and 1 more | 2026-04-20 | 6.1 Medium |
| A Stored HTML Injection vulnerability was discovered in the Asset List functionality due to improper validation of network traffic data. An unauthenticated attacker can send specially crafted network packets to inject HTML tags into asset attributes. When a victim views the affected assets in the Asset List (and similar functions), the injected HTML renders in their browser, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration. | ||||
| CVE-2025-64999 | 1 Checkmk | 1 Checkmk | 2026-04-20 | 5.4 Medium |
| Improper neutralization of input in Checkmk versions 2.4.0 before 2.4.0p22, and 2.3.0 before 2.3.0p43 allows an attacker that can manipulate a host's check output to inject malicious JavaScript into the Synthetic Monitoring HTML logs, which can then be accessed via a crafted phishing link. | ||||
| CVE-2025-40894 | 2 Nozomi Networks, Nozominetworks | 4 Cmc, Guardian, Cmc and 1 more | 2026-04-20 | 4.4 Medium |
| A Stored HTML Injection vulnerability was discovered in the Alerted Nodes Dashboard functionality due to improper validation on an input parameter. A malicious authenticated user with the required privileges could edit a node label to inject HTML tags. If the system is configured to use the Alerted Nodes Dashboard, and alerts are reported for the affected node, then the injected HTML may render in the browser of a victim user interacting with it, enabling phishing and possibly open redirect attacks. Full XSS exploitation and direct information disclosure are prevented by the existing input validation and Content Security Policy configuration. | ||||
| CVE-2025-49547 | 1 Adobe | 2 Adobe Experience Manager, Experience Manager | 2026-04-20 | 5.4 Medium |
| Adobe Experience Manager versions FP11.4 and earlier are affected by a stored Cross-Site Scripting (XSS) vulnerability that could be abused by a low-privileged attacker to inject malicious scripts into vulnerable form fields. Malicious JavaScript may be executed in a victim’s browser when they browse to the page containing the vulnerable field. Scope is changed. | ||||
| CVE-2026-40922 | 2 B3log, Siyuan | 2 Siyuan, Siyuan | 2026-04-20 | 5.4 Medium |
| SiYuan is an open-source personal knowledge management system. In versions 3.6.1 through 3.6.3, a prior fix for XSS in bazaar README rendering (incomplete fix for CVE-2026-33066) enabled the Lute HTML sanitizer, but the sanitizer does not block iframe tags, and its URL-prefix blocklist does not effectively filter srcdoc attributes which contain raw HTML rather than URLs. A malicious bazaar package author can include an iframe with a srcdoc attribute containing embedded scripts in their README. When other users view the package in SiYuan's marketplace UI, the payload executes in the Electron context with full application privileges, enabling arbitrary code execution on the user's machine. This issue has been fixed in version 3.6.4. | ||||
| CVE-2025-14151 | 2 Wordpress, Wp-slimstat | 2 Wordpress, Slimstat Analytics | 2026-04-20 | 7.2 High |
| The SlimStat Analytics plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'outbound_resource' parameter in the slimtrack AJAX action in all versions up to, and including, 5.3.2. This is due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. | ||||
| CVE-2025-14283 | 2 Wordpress, Wpblockart | 2 Wordpress, Blockart Blocks | 2026-04-20 | 6.4 Medium |
| The BlockArt Blocks – Gutenberg Blocks, Page Builder Blocks ,WordPress Block Plugin, Sections & Template Library plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the BlockArt Counter in all versions up to, and including, 2.2.14 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. | ||||
| CVE-2025-64672 | 1 Microsoft | 1 Sharepoint Server | 2026-04-20 | 8.8 High |
| Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network. | ||||
| CVE-2025-64677 | 1 Microsoft | 2 Office Out-of-box Experience, Office Out Of-box Experience | 2026-04-20 | 8.2 High |
| Improper neutralization of input during web page generation ('cross-site scripting') in Office Out-of-Box Experience allows an unauthorized attacker to perform spoofing over a network. | ||||
| CVE-2025-64675 | 1 Microsoft | 2 Azure Cosmos Db, Cosmos Db | 2026-04-20 | 8.3 High |
| Improper neutralization of input during web page generation ('cross-site scripting') in Azure Cosmos DB allows an unauthorized attacker to perform spoofing over a network. | ||||
| CVE-2026-2505 | 2 Elzahlan, Wordpress | 2 Categories Images, Wordpress | 2026-04-20 | 5.4 Medium |
| The Categories Images plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 3.3.1, via the 'z_taxonomy_image' shortcode. This is due to the shortcode rendering path passing attacker-controlled class input into a fallback image builder that concatenates HTML attributes without proper escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts that execute when users interact with the injected frontend page via the 'class' shortcode attribute. | ||||
| CVE-2026-40322 | 2 B3log, Siyuan | 2 Siyuan, Siyuan | 2026-04-20 | 9.1 Critical |
| SiYuan is an open-source personal knowledge management system. In versions 3.6.3 and below, Mermaid diagrams are rendered with securityLevel set to "loose", and the resulting SVG is injected into the DOM via innerHTML. This allows attacker-controlled javascript: URLs in Mermaid code blocks to survive into the rendered output. On desktop builds using Electron, windows are created with nodeIntegration enabled and contextIsolation disabled, escalating the stored XSS to arbitrary code execution when a victim opens a note containing a malicious Mermaid block and clicks the rendered diagram node. This issue has been fixed in version 3.6.4. | ||||
| CVE-2018-25250 | 1 Mybb | 2 Last User Threads, Mybb | 2026-04-20 | 7.2 High |
| MyBB Last User's Threads in Profile Plugin 1.2 contains a persistent cross-site scripting vulnerability that allows attackers to inject malicious scripts by crafting thread subjects with script tags. Attackers can create threads with script payloads in the subject field that execute when users visit the attacker's profile page. | ||||
| CVE-2018-25247 | 1 Mybb | 3 Mybb, Mybb Like Plugin, Thankyou\/like System | 2026-04-20 | 6.1 Medium |
| MyBB Like Plugin 3.0.0 contains a cross-site scripting vulnerability that allows attackers to inject malicious scripts by creating posts or threads with unvalidated subject content. Attackers can craft post subjects containing script tags that execute when other users view the attacker's profile, where liked posts are displayed without sanitization. | ||||
| CVE-2026-5026 | 1 Langflow | 1 Langflow | 2026-04-20 | 5.4 Medium |
| The '/api/v1/files/images/{flow_id}/{file_name}' endpoint serves SVG files with the 'image/svg+xml' content type without sanitizing their content. Since SVG files can contain embedded JavaScript, an attacker can upload a malicious SVG that executes arbitrary JavaScript when viewed by other users, leading to stored cross-site scripting (XSS). This allows stealing authentication tokens stored in cookies, including JWT access and refresh tokens. | ||||
| CVE-2026-1444 | 1 Ijason-liu | 1 Books Manager | 2026-04-18 | 2.4 Low |
| A vulnerability has been found in iJason-Liu Books_Manager up to 298ba736387ca37810466349af13a0fdf828e99c. This affects an unknown part of the file controllers/books_center/add_book_check.php. Such manipulation of the argument mark leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. | ||||