CVE-2025-65676Public exploitNetwork attack vector

Stored JavaScript execution via unsanitized SVG covers

Published Nov 26, 2025 · Updated Jul 5, 2026

Stored XSS in ClassroomIO LMS 0.1.13 allows remote authenticated users to execute JavaScript through a crafted SVG course cover image. The course landing-page cover upload accepts an SVG containing embedded JavaScript without sanitizing it, stores the file, and serves the active content when the image is opened. Exploitation requires course access and a viewer to open the uploaded cover image; the script runs in the trusted site context and enables session theft, redirects, or actions in the viewer account.

CVSS severity5.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in ClassroomIO LMS 0.1.13 allows remote authenticated users to execute JavaScript through a crafted SVG course cover image. The course landing-page cover upload accepts an SVG containing embedded JavaScript without sanitizing it, stores the file, and serves the active content when the image is opened. Exploitation requires course access and a viewer to open the uploaded cover image; the script runs in the trusted site context and enables session theft, redirects, or actions in the viewer account.

The record

CVE
CVE-2025-65676
Published
Nov 26, 2025
Updated
Jul 5, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, CAPEC-592, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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')
CAPEC-592Stored XSS
T1189Drive-by Compromise

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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