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CVE-2020-15138— Cross-Site Scripting in Prism

Quick assessment

Affected
PrismJS prism
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Prism是美国Prism个人开发者的一个应用软件。是一种轻量级的，可扩展的语法突出显示工具。 Prism 1.1.0及之前版本（使用_Previewers_ plugin 1.10.0及之前版本或Easing_ plugin 1.1.0版本至1.9.0版本）中存在跨站脚本漏洞。攻击者可利用该漏洞在Safari和Internet Explorer中执行任意代码。

CVSS 7.1 · High EPSS 2.04% · P80
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I. Basic Information for CVE-2020-15138

Vulnerability Information
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Vulnerability Title
Cross-Site Scripting in Prism
Source: CVE Program / CVE List V5
Vulnerability Description
Prism is vulnerable to Cross-Site Scripting. The easing preview of the Previewers plugin has an XSS vulnerability that allows attackers to execute arbitrary code in Safari and Internet Explorer. This impacts all Safari and Internet Explorer users of Prism >=v1.1.0 that use the _Previewers_ plugin (>=v1.10.0) or the _Previewer: Easing_ plugin (v1.1.0 to v1.9.0). This problem is fixed in version 1.21.0. To workaround the issue without upgrading, disable the easing preview on all impacted code blocks. You need Prism v1.10.0 or newer to apply this workaround.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L
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
Prism 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Prism是美国Prism个人开发者的一个应用软件。是一种轻量级的，可扩展的语法突出显示工具。 Prism 1.1.0及之前版本（使用_Previewers_ plugin 1.10.0及之前版本或Easing_ plugin 1.1.0版本至1.9.0版本）中存在跨站脚本漏洞。攻击者可利用该漏洞在Safari和Internet Explorer中执行任意代码。
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
PrismJS prism >= 1.1.0, < 1.21.0 -

II. Public POCs for CVE-2020-15138

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9488 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2020-15138

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Patches & Fixes for CVE-2020-15138 (1)

Vendor Advisories for CVE-2020-15138 (1)

Other References for CVE-2020-15138 (1)

IV. Related Vulnerabilities

Same product: prism
Same vendor: PrismJS
Same weakness: CWE-79

V. Comments for CVE-2020-15138

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