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CVE-2026-75526— django CMS: Stored XSS in edit-mode plugin exception rendering

Quick assessment

Affected
django-cms django-cms
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.

django CMS 是一个易用且对开发者友好的企业级内容管理系统，基于 Django 框架构建。在版本 5.0.8 至 5.0.9 之间， 中的 方法在编辑模式下插件渲染失败时，会将攻击者可控的已存储值传递给 。 具体而言，来自 、异常消息、占位符本身或 的值会被插值到一个名为 “cms-rendering-exception” 的标题中，随后通过 函数返回。由于该标题未经过转义处理，存储的 HTML 代码会在编辑器的浏览器中执行。此外，即使 Django 的 设置为 ，也无法阻止该自定义标题的渲染。 该漏洞已通

CVSS 4.4 · Medium EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
django-cms django-cms >= 5.0.8, < 5.0.9 affected
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I. Basic Information for CVE-2026-75526

Vulnerability Information
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Vulnerability Title
django CMS: Stored XSS in edit-mode plugin exception rendering
Source: CVE Program / CVE List V5
Vulnerability Description
django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. From 5.0.8 until 5.0.9, ContentRenderer.render_placeholder in cms/plugin_rendering.py can pass stored, attacker-controlled values to ContentRenderer.render_exception when plugin rendering fails in edit mode. Values from get_short_description(), the exception message, the placeholder, or placeholder.source are interpolated into a cms-rendering-exception heading and later returned through mark_safe. Because the heading is not escaped, stored HTML executes in an editor’s browser, and settings.DEBUG does not prevent the custom heading from rendering. The fix uses format_html to escape the message before safe placeholder output is returned. This issue is fixed in versions 5.0.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
django-cms django-cms >= 5.0.8, < 5.0.9 -

II. Public POCs for CVE-2026-75526

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III. Intelligence Information for CVE-2026-75526

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Patches & Fixes for CVE-2026-75526 (2)

Vendor Advisories for CVE-2026-75526 (1)

Vendor Pages for CVE-2026-75526 (1)

Same Patch Batch · django-cms · 2026-08-20 · 7 CVEs total

CVE-2026-54623 7.1 HIGH django CMS: Plugin move endpoint allows cyclic reparenting (DoS)
CVE-2026-54622 6.5 MEDIUM django CMS: Clipboard copy IDOR discloses unauthorized plugin content
CVE-2026-54624 6.5 MEDIUM django CMS: Structure endpoint bypasses page-view permission
CVE-2026-63003 6.5 MEDIUM django CMS: Broken access control in page *Duplicate* allows reading the content of any pa
CVE-2026-54625 4.8 MEDIUM django CMS: Page cache ignores plugin-declared Vary headers (disclosure & poisoning)
CVE-2026-61663 4.3 MEDIUM django CMS: Missing authorization in `render_object_structure` discloses non-PageContent p

IV. Related Vulnerabilities

Same product: django-cms
Same vendor: django-cms
Same weakness: CWE-79

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