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CVE-2020-15118— Cross-Site Scripting in Wagtail

Quick assessment

Affected
wagtail wagtail
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Torchbox Wagtail是英国Torchbox公司的一套开源的内容管理系统（CMS）。 Torchbox Wagtail 2.7.4之前版本和2.9.3之前版本中存在跨站脚本漏洞。该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。

CVSS 5.7 · Medium EPSS 1.10% · P65
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I. Basic Information for CVE-2020-15118

Vulnerability Information
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Vulnerability Title
Cross-Site Scripting in Wagtail
Source: CVE Program / CVE List V5
Vulnerability Description
In Wagtail before versions 2.7.4 and 2.9.3, when a form page type is made available to Wagtail editors through the `wagtail.contrib.forms` app, and the page template is built using Django's standard form rendering helpers such as form.as_p, any HTML tags used within a form field's help text will be rendered unescaped in the page. Allowing HTML within help text is an intentional design decision by Django; however, as a matter of policy Wagtail does not allow editors to insert arbitrary HTML by default, as this could potentially be used to carry out cross-site scripting attacks, including privilege escalation. This functionality should therefore not have been made available to editor-level users. The vulnerability is not exploitable by an ordinary site visitor without access to the Wagtail admin. Patched versions have been released as Wagtail 2.7.4 (for the LTS 2.7 branch) and Wagtail 2.9.3 (for the current 2.9 branch). In these versions, help text will be escaped to prevent the inclusion of HTML tags. Site owners who wish to re-enable the use of HTML within help text (and are willing to accept the risk of this being exploited by editors) may set WAGTAILFORMS_HELP_TEXT_ALLOW_HTML = True in their configuration settings. Site owners who are unable to upgrade to the new versions can secure their form page templates by rendering forms field-by-field as per Django's documentation, but omitting the |safe filter when outputting the help text.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
Torchbox Wagtail 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Torchbox Wagtail是英国Torchbox公司的一套开源的内容管理系统（CMS）。 Torchbox Wagtail 2.7.4之前版本和2.9.3之前版本中存在跨站脚本漏洞。该漏洞源于WEB应用缺少对客户端数据的正确验证。攻击者可利用该漏洞执行客户端代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
wagtail wagtail < 2.7.4 -

II. Public POCs for CVE-2020-15118

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III. Intelligence Information for CVE-2020-15118

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Patches & Fixes for CVE-2020-15118 (1)

Vendor Advisories for CVE-2020-15118 (1)

Other References for CVE-2020-15118 (2)

IV. Related Vulnerabilities

Same product: wagtail
Same vendor: wagtail
Same weakness: CWE-79

V. Comments for CVE-2020-15118

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