CVE-2021-43776

描述

### Impact This vulnerability allows a malicious actor to trick another user into visiting a vulnerable URL that executes an XSS attack. This attack can potentially allow the attacker to exfiltrate access tokens or other secrets from the user's browser. The default CSP does prevent this attack, but it is expected that some deployments have these policies disabled due to incompatibilities. ### Patches This is vulnerability is patched in version `0.4.9` of `@backstage/plugin-auth-backend`. ### For more information If you have any questions or comments about this advisory: * Open an issue in the [Backstage repository](https://github.com/backstage/backstage) * Visit our chat, linked to in [Backstage README](https://github.com/backstage/backstage)

如何修補 CVE-2021-43776

要修補 CVE-2021-43776,請將受影響套件升級到下列已修補版本。

• —升級至 0.4.9 或更新版本

CVE-2021-43776 正在被利用嗎?

低 — EPSS 為 0.7%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 0.4.9

CVSS 分數

參考連結(4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-43776
• PATCHgithub.com/backstage/backstage
• WEBgithub.com/backstage/backstage/security/advisories/GHSA-w7fj-336r-vw49
• WEBgithub.com/backstage/backstage/tree/master/plugins/auth-backend