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💡 Keep dependencies up to date — most exploits target known, patchable vulnerabilities.
CVE-2026-21821 identifies a Cross-Site Scripting (XSS) vulnerability within the HCL BigFix SCM Reporting site. This vulnerability arises from the use of an outdated and unsupported version of the jQuery 1.x library. Exploitation could allow attackers to inject malicious scripts, potentially leading to data theft or unauthorized actions. Versions 1.0.0 through 11.0.5 are affected, and a fix is available via upgrading jQuery.
影响与攻击场景翻译中…
The presence of an outdated jQuery library in HCL BigFix SCM Reporting creates a significant attack surface. Attackers can leverage publicly known vulnerabilities within jQuery 1.x to execute arbitrary JavaScript code within the context of a user's browser. This could manifest as stealing session cookies, redirecting users to malicious websites, or defacing the reporting site. The impact extends beyond the reporting site itself, as a successful attack could potentially compromise the underlying BigFix infrastructure if user credentials or sensitive data are exposed. The lack of security updates for jQuery 1.x means that newly discovered vulnerabilities will not be patched, increasing the long-term risk.
利用背景翻译中…
CVE-2026-21821 was published on May 13, 2026. The vulnerability's severity is rated HIGH (CVSS 8.3). As jQuery 1.x is end-of-life, numerous known vulnerabilities exist within the library, making exploitation relatively straightforward. Public proof-of-concept exploits are likely to emerge, increasing the risk of active campaigns. Monitor security advisories from HCL and jQuery for further updates and mitigation guidance.
威胁情报
漏洞利用状态
CISA SSVC
CVSS 向量
这些指标意味着什么？
- Attack Vector
- 网络 — 可通过互联网远程利用，无需物理或本地访问。攻击面最大。
- Attack Complexity
- 高 — 需要竞态条件、非默认配置或特定情况。难以可靠利用。
- Privileges Required
- 无 — 无需认证，无需凭证即可利用。
- User Interaction
- 需要 — 受害者必须打开文件、点击链接或访问特制页面。
- Scope
- 已改变 — 攻击可以超出脆弱组件，影响其他系统。
- Confidentiality
- 高 — 完全丧失机密性，攻击者可读取所有数据。
- Integrity
- 高 — 攻击者可写入、修改或删除任何数据。
- Availability
- 高 — 完全崩溃或资源耗尽，完全拒绝服务。
受影响的软件
弱点分类 (CWE)
时间线
- 已保留
- 发布日期
- 修改日期
缓解措施和替代方案翻译中…
The primary mitigation for CVE-2026-21821 is to upgrade the jQuery library to a supported version. HCL should provide updated versions of BigFix SCM Reporting with a patched jQuery library. If a direct upgrade is not immediately feasible, consider implementing a Content Security Policy (CSP) to restrict the execution of inline scripts and limit the sources from which scripts can be loaded. Furthermore, a Web Application Firewall (WAF) can be configured to filter out malicious JavaScript payloads targeting jQuery functions. Verify the upgrade by testing the reporting site for XSS vulnerabilities after applying the patch.
修复方法翻译中…
Actualice la biblioteca jQuery a una versión compatible y con soporte. HCL recomienda actualizar a una versión de jQuery que reciba actualizaciones de seguridad y correcciones de errores.
常见问题翻译中…
What is CVE-2026-21821 — XSS in HCL BigFix SCM Reporting?
CVE-2026-21821 is a HIGH severity vulnerability affecting HCL BigFix SCM Reporting versions 1.0.0–11.0.5. It's caused by an outdated jQuery library, allowing attackers to inject malicious scripts via Cross-Site Scripting (XSS).
Am I affected by CVE-2026-21821 in HCL BigFix SCM Reporting?
If you are using HCL BigFix SCM Reporting versions between 1.0.0 and 11.0.5, you are potentially affected. Check your jQuery version to confirm.
How do I fix CVE-2026-21821 in HCL BigFix SCM Reporting?
Upgrade to a patched version of HCL BigFix SCM Reporting that includes a supported jQuery version. Implement a Content Security Policy (CSP) as an interim measure.
Is CVE-2026-21821 being actively exploited?
While no active campaigns are currently confirmed, the vulnerability's severity and the age of the jQuery library suggest a high likelihood of exploitation. Monitor security advisories closely.
Where can I find the official HCL advisory for CVE-2026-21821?
Refer to the HCL Support website and security advisories for the latest information and official guidance regarding CVE-2026-21821. Search for 'HCL BigFix SCM Reporting security advisories'.
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