CVE-2023-0878Public exploitNetwork attack vector

Cross-site scripting via protocol-relative payload URLs

Published Feb 17, 2023 · Updated Mar 18, 2025

Cross-site scripting in Nuxt before 3.2.1 allows remote attackers to execute script in a user's browser via a crafted payload URL. The _getPayloadURL function relied on a parsed-host comparison instead of rejecting protocol-relative input before constructing a payload script URL. Exploitation requires an application flow that supplies attacker-controlled routing input and a user who loads the resulting page, exposing browser-accessible data and actions.

CVSS severity6.1
Medium
EPSS probability0.53%
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 Nuxt before 3.2.1 allows remote attackers to execute script in a user's browser via a crafted payload URL. The _getPayloadURL function relied on a parsed-host comparison instead of rejecting protocol-relative input before constructing a payload script URL. Exploitation requires an application flow that supplies attacker-controlled routing input and a user who loads the resulting page, exposing browser-accessible data and actions.

The record

CVE
CVE-2023-0878
Published
Feb 17, 2023
Updated
Mar 18, 2025
Vendor
Nuxt
Product
Nuxt
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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=unspecified <3.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nuxt · Nuxtversion=unspecified <3.2.1

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1huntr.devCVSS:3.0/AV:N/AC:L/PR:N/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

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