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You can search for vulnerabilities managed by JVN (Japan Vulnerability Note) and NVD (National Vulnerability Database).
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To search by CWE, please refer to the CWE Overview and check the CWE number.

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JVN Vulnerability Information

Update Date":June 2, 2026, 10 a.m.

No CVSS Level
Attach Vector		 Vendor Name Project Name Title CWE CVE Update Date Publication Date Impact
Show		 Exploit
PoC
Search
256241 10 危険 Opera Software ASA - Opera における脆弱性 CWE-noinfo
情報不足 		CVE-2009-0916 2010-09-27 16:08 2009-03-3 Show GitHub Exploit DB Packet Storm
256242 4.3 警告 Opera Software ASA - Windows 上で稼働する Opera におけるサービス運用妨害 (DoS) の脆弱性 CWE-399
リソース管理の問題 		CVE-2008-5428 2010-09-27 16:07 2008-12-11 Show GitHub Exploit DB Packet Storm
256243 4.3 警告 Opera Software ASA - Opera の Opera.dll におけるクロスサイトスクリプティングの脆弱性 CWE-79
クロスサイト・スクリプティング（XSS） 		CVE-2008-4725 2010-09-27 16:07 2008-10-23 Show GitHub Exploit DB Packet Storm
256244 5.8 警告 Opera Software ASA - Opera における新規フィードの購読を作成される脆弱性 CWE-264
認可・権限・アクセス制御 		CVE-2008-4698 2010-09-27 16:05 2008-10-23 Show GitHub Exploit DB Packet Storm
256245 10 危険 Opera Software ASA - Windows 上で稼働する Opera における任意のコードを実行される脆弱性 CWE-noinfo
情報不足 		CVE-2008-4293 2010-09-27 16:05 2008-09-27 Show GitHub Exploit DB Packet Storm
256246 10 危険 Opera Software ASA - Opera における CRL の更新時の処理に関する脆弱性 CWE-255
CWE-noinfo
CVE-2008-4292 2010-09-27 16:04 2008-09-27 Show GitHub Exploit DB Packet Storm
256247 6.4 警告 Opera Software ASA - Opera における Web スクリプトを含むページの URL をアドレスフィールドに表示される脆弱性 CWE-20
不適切な入力確認 		CVE-2008-4200 2010-09-27 16:04 2008-09-27 Show GitHub Exploit DB Packet Storm
256248 5 警告 Opera Software ASA - Opera におけるローカルファイル名の有効性を判別される脆弱性 CWE-200
情報漏えい 		CVE-2008-4199 2010-09-27 16:04 2008-09-27 Show GitHub Exploit DB Packet Storm
256249 7.5 危険 Opera Software ASA - Opera における http ページ上で危険な操作を実行させられる脆弱性 CWE-Other
その他 		CVE-2008-4198 2010-09-27 16:03 2008-09-27 Show GitHub Exploit DB Packet Storm
256250 9.3 危険 Opera Software ASA - Opera における任意のコードを実行される脆弱性 CWE-399
リソース管理の問題 		CVE-2008-4197 2010-09-27 16:03 2008-09-27 Show GitHub Exploit DB Packet Storm
NVD Vulnerability Information

Update Date:June 2, 2026, 4:18 a.m.

No CVSS Level
Attach Vector		 Vendor Name Project Name Title CWE CVE Update Date Publication Date Show Affected Exploit
PoC
Search
195001 6.5 MEDIUM
Network 		mozilla firefox The browser could have been confused into transferring a screen sharing state into another tab, which would leak unintended information. This vulnerability affects Firefox < 85. CWE-668
 Exposure of Resource to Wrong Sphere 		CVE-2021-23958 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195002 7.4 HIGH
Network 		mozilla firefox Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffect… NVD-CWE-noinfo
CVE-2021-23957 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195003 6.5 MEDIUM
Network 		mozilla firefox An ambiguous file picker design could have confused users who intended to select and upload a single file into uploading a whole directory. This was addressed by adding a new prompt. This vulnerabili… NVD-CWE-noinfo
CVE-2021-23956 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195004 6.1 MEDIUM
Network 		mozilla firefox The browser could have been confused into transferring a pointer lock state into another tab, which could have lead to clickjacking attacks. This vulnerability affects Firefox < 85. CWE-1021
 Improper Restriction of Rendered UI Layers or Frames 		CVE-2021-23955 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195005 8.8 HIGH
Network 		mozilla firefox
firefox_esr
thunderbird 		Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability … CWE-843
Type Confusion 		CVE-2021-23954 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195006 4.3 MEDIUM
Network 		mozilla firefox
firefox_esr
thunderbird 		If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects … NVD-CWE-noinfo
CVE-2021-23953 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195007 8.1 HIGH
Network 		mozilla firefox When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be u… CWE-1021
 Improper Restriction of Rendered UI Layers or Frames 		CVE-2021-23976 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195008 6.5 MEDIUM
Network 		mozilla firefox The developer page about:memory has a Measure function for exploring what object types the browser has allocated and their sizes. When this function was invoked we incorrectly called the sizeof funct… CWE-862
 Missing Authorization 		CVE-2021-23975 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195009 6.1 MEDIUM
Network 		mozilla firefox The DOMParser API did not properly process '<noscript>' elements for escaping. This could be used as an mXSS vector to bypass an HTML Sanitizer. This vulnerability affects Firefox < 86. NVD-CWE-noinfo
CVE-2021-23974 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm
195010 6.5 MEDIUM
Network 		mozilla
debian 		firefox
firefox_esr
thunderbird
debian_linux 		When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted, and the content of that error may have revealed information about the resource. This vulnerab… CWE-209
Information Exposure Through an Error Message 		CVE-2021-23973 2024-11-21 14:52 2021-02-26 Show GitHub Exploit DB Packet Storm