CVE-2024-53262Network attack vector

Script injection via unescaped error messages

Published Nov 25, 2024 · Updated Nov 25, 2024

Cross-site scripting in Svelte SvelteKit before 2.8.3 allows remote authenticated users to inject script through crafted error messages. The static error.html renderer substitutes %sveltekit.error.message% without HTML escaping, placing markup from an explicitly created server error into the response. Exploitation requires application code to put user input in a custom Error message and a user to render that error page; uncaught errors use a fixed internal-error message.

CVSS severity2.0
Low
EPSS probability0.48%
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 Svelte SvelteKit before 2.8.3 allows remote authenticated users to inject script through crafted error messages. The static error.html renderer substitutes %sveltekit.error.message% without HTML escaping, placing markup from an explicitly created server error into the response. Exploitation requires application code to put user input in a custom Error message and a user to render that error page; uncaught errors use a fixed internal-error message.

The record

CVE
CVE-2024-53262
Published
Nov 25, 2024
Updated
Nov 25, 2024
Vendor
Svelte
Product
SvelteKit
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 25, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 25, 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=< 2.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Svelte · SvelteKitversion=< 2.8.3

Published CVSS scores

2.0GitHub, Inc.CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
0.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:N
5.4NIST NVDCVSS: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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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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