CVE-2024-21550Network attack vector

Persistent XSS via unvalidated charge-box ID

Published Aug 12, 2024 · Updated Aug 12, 2024

Stored XSS in SteVe before 3.5.1, 3.6.0, and 3.7.0 allows remote attackers to inject script through WebSocket charge-box IDs. OcppWebSocketHandshakeHandler accepted the final WebSocket URL segment as chargeBoxId without applying ChargeBoxIdValidator before storing and rendering it. A management-interface user must view the stored identifier, which executes attacker-supplied HTML or JavaScript in that user's browser and permits page-content access or modification.

CVSS severity6.1
Medium
EPSS probability0.40%
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 SteVe before 3.5.1, 3.6.0, and 3.7.0 allows remote attackers to inject script through WebSocket charge-box IDs. OcppWebSocketHandshakeHandler accepted the final WebSocket URL segment as chargeBoxId without applying ChargeBoxIdValidator before storing and rendering it. A management-interface user must view the stored identifier, which executes attacker-supplied HTML or JavaScript in that user's browser and permits page-content access or modification.

The record

CVE
CVE-2024-21550
Published
Aug 12, 2024
Updated
Aug 12, 2024
Vendor
SteVe Community
Product
SteVe
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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 <3.5.1
  2. Affected versionversion=3.6.0 <3.6.1
  3. Affected versionversion=3.7.0 <3.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

SteVe Community · SteVeversion=0 <3.5.1; version=3.6.0 <3.6.1; version=3.7.0 <3.7.1

Published CVSS scores

6.1NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1SnykCVSS:3.1/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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