{"id":5053,"date":"2025-05-19T06:38:12","date_gmt":"2025-05-19T06:38:12","guid":{"rendered":"http:\/\/localhost\/?p=5053"},"modified":"2025-05-19T06:38:12","modified_gmt":"2025-05-19T06:38:12","slug":"firefox-patches-2-zero-days-exploited-at-pwn2own-berlin-with-100k-in-rewards","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=5053","title":{"rendered":"Firefox Patches 2 Zero-Days Exploited at Pwn2Own Berlin with $100K in Rewards"},"content":{"rendered":"<h2>Security Update News<\/h2>\n<h3>Update Information<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Title<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">Firefox Patches 2 Zero-Days Exploited at Pwn2Own Berlin with $100K in Rewards<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Update ID<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">THN:7627273AD698BDC50961F1A6A574BA2C<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Type<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">thn<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Published<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-05-19T10:37:00<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Last Updated<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">2025-05-19T10:37:28<\/td>\n<\/tr>\n<\/table>\n<h3>Security Impact<\/h3>\n<table style=\"width:100%; border-collapse: collapse; margin-bottom: 20px;\">\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">CVSS Score<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\">0.0<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Severity<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd; color: #666666; font-weight: bold;\">NONE<\/td>\n<\/tr>\n<tr>\n<th style=\"text-align: left; padding: 8px; border: 1px solid #ddd; \">Attack Vector<\/th>\n<td style=\"padding: 8px; border: 1px solid #ddd;\"><\/td>\n<\/tr>\n<\/table>\n<h3>Affected CVEs<\/h3>\n<div style=\" padding: 15px; border: 1px solid #ddd; margin-bottom: 20px;\">\n<ul style=\"margin: 0; padding-left: 20px;\">\n<li>CVE-2025-4918<\/li>\n<li>CVE-2025-4919<\/li>\n<\/ul>\n<\/div>\n<h3>Update Details<\/h3>\n<div style=\"; padding: 15px; border-left: 4px solid #4CAF50; margin-bottom: 20px;\">\n![](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>Mozilla has released security updates to address two critical security flaws in its Firefox browser that could be potentially exploited to access sensitive data or achieve code execution.<\/p>\n<p>The vulnerabilities, both of which were exploited as a zero-day at Pwn2Own Berlin, are listed below &#8211;<\/p>\n<p>  * CVE-2025-4918 &#8211; An out-of-bounds access vulnerability when resolving Promise objects that could allow an attacker to perform read or write on a JavaScript Promise object<br \/>  * CVE-2025-4919 &#8211; An out-of-bounds access vulnerability when optimizing linear sums that could allow an attacker to perform read or write on a JavaScript object by confusing array index sizes<\/p>\n<p>In other words, successful exploitation of either of the flaws could permit an adversary to achieve out-of-bounds read or write, which could then be abused to access otherwise sensitive information or result in memory corruption that could pave the way for code execution.<\/p>\n<p>![Cybersecurity](data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8Xw8AAoMBgDTD2qgAAAAASUVORK5CYII=)<\/p>\n<p>The vulnerabilities affect the following versions of the Firefox browser &#8211;<\/p>\n<p>  * All versions of Firefox before 138.0.4<br \/>  * All versions of Firefox Extended Support Release (ESR) before 128.10.1<br \/>  * All versions of Firefox ESR before 115.23.1<\/p>\n<p>Edouard Bochin and Tao Yan from Palo Alto Networks have been credited with finding and reporting CVE-2025-4918. The discovery of CVE-2025-4919 has been credited to Manfred Paul.<\/p>\n<p>It&#8217;s worth noting that both shortcomings were demonstrated at the Pwn2Own Berlin hacking contest last week for which they were awarded $50,000 each.<\/p>\n<p>With web browsers continuing to be an attractive vector for malware delivery, users are advised to update their instances to the latest version to safeguard against potential threats.<\/p>\n<p>Found this article interesting? Follow us on Twitter _\uf099_ and LinkedIn to read more exclusive content we post.\n<\/div>\n<p><a href=\"https:\/\/thehackernews.com\/2025\/05\/firefox-patches-2-zero-days-exploited.html\" target=\"_blank\" style=\"display: inline-block; color: white; padding: 10px 20px; text-decoration: none; border-radius: 4px;\">View Advisory Details<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Security Update News Update Information Title Firefox Patches 2 Zero-Days Exploited at Pwn2Own Berlin with $100K in Rewards Update ID THN:7627273AD698BDC50961F1A6A574BA2C Type thn Published 2025-05-19T10:37:00&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[6,8,34,12,13,33,7,11,43,5],"class_list":["post-5053","post","type-post","status-publish","format-standard","hentry","category-category_news","tag-cve","tag-cvss","tag-cvss-00","tag-exploit","tag-news","tag-none","tag-security","tag-tapic","tag-thn","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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