CVE-2023-37534Network attack vector

Script injection via insufficient URI protocol allowlist

Published Apr 24, 2025 · Updated Apr 24, 2025

Cross-site scripting in HCL Leap before 9.3.4 allows remote attackers to inject script through crafted query parameters. The URI protocol allowlist accepts a script-capable scheme from a query parameter and passes it into page output without sufficient rejection. A victim must open the crafted URL; the injected script can read page data and modify content in that victim's browser session.

CVSS severity7.1
High
EPSS probability0.23%
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 HCL Leap before 9.3.4 allows remote attackers to inject script through crafted query parameters. The URI protocol allowlist accepts a script-capable scheme from a query parameter and passes it into page output without sufficient rejection. A victim must open the crafted URL; the injected script can read page data and modify content in that victim's browser session.

The record

CVE
CVE-2023-37534
Published
Apr 24, 2025
Updated
Apr 24, 2025
Vendor
HCL Software
Product
HCL Leap
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=< 9.3.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL Leapversion=< 9.3.4

Published CVSS scores

7.1HCL SoftwareCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
6.1NIST NVDCVSS: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.

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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')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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