CVE-2025-64501Public exploitNetwork attack vector

Cross-site scripting via unescaped HTML attributes

Published Nov 10, 2025 · Updated Nov 10, 2025

Cross-site scripting in Etamin Studio prosemirror_to_html before 0.2.1 allows remote authenticated users to execute script in viewers' browsers. The render_opening_tag method inserts each ProseMirror tag attribute value into quoted HTML without escaping it, turning crafted links or event handlers into executable markup. Exploitation requires attacker-controlled ProseMirror JSON and a user who views the generated HTML; the resulting JavaScript runs in that viewer's browser.

CVSS severity7.6
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Etamin Studio prosemirror_to_html before 0.2.1 allows remote authenticated users to execute script in viewers' browsers. The render_opening_tag method inserts each ProseMirror tag attribute value into quoted HTML without escaping it, turning crafted links or event handlers into executable markup. Exploitation requires attacker-controlled ProseMirror JSON and a user who views the generated HTML; the resulting JavaScript runs in that viewer's browser.

The record

CVE
CVE-2025-64501
Published
Nov 10, 2025
Updated
Nov 10, 2025
Vendor
Etamin Studio
Product
prosemirror_to_html
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 10, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Etamin Studio · prosemirror_to_htmlversion=< 0.2.1

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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