CVE-2024-51492Public exploitNetwork attack vector

Session-token theft via executable SVG uploads

Published Nov 1, 2024 · Updated Nov 1, 2024

Stored XSS in Zusam before 0.5.6 allows remote attackers to steal a viewer's long-lived session token through a crafted SVG upload. The image-upload path accepts SVG content, and the raw-file response lets embedded onload JavaScript execute in the Zusam origin and read the API key from local storage. Exploitation requires a target to load the raw image; the stolen static API key remains valid indefinitely and grants the target's application access.

CVSS severity8.8
High
EPSS probability0.47%
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 Zusam before 0.5.6 allows remote attackers to steal a viewer's long-lived session token through a crafted SVG upload. The image-upload path accepts SVG content, and the raw-file response lets embedded onload JavaScript execute in the Zusam origin and read the API key from local storage. Exploitation requires a target to load the raw image; the stolen static API key remains valid indefinitely and grants the target's application access.

The record

CVE
CVE-2024-51492
Published
Nov 1, 2024
Updated
Nov 1, 2024
Vendor
Zusam
Product
Zusam
Classifications
CWE-79, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 1, 2024Record 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 <0.5.6
  2. Affected versionversion=< 0.5.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Zusam · Zusamversion=0 <0.5.6; version=< 0.5.6

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1528Steal Application Access Token

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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