CVE-2026-32993Network attack vector

Unauthenticated header injection via unsanitized status parameter

Published May 13, 2026 · Updated May 13, 2026

CRLF injection in affected WebPros cPanel and WP Squared releases allows remote attackers to insert arbitrary HTTP response headers. The unauthenticated /unprotected/nova_error handler in cpsrvd places the status query value into an HTTP response without neutralizing carriage-return and line-feed sequences. Network access to the endpoint is sufficient; attacker-controlled headers can alter response handling, but no code execution or server compromise is reported.

CVSS severity8.3
High
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CRLF injection in affected WebPros cPanel and WP Squared releases allows remote attackers to insert arbitrary HTTP response headers. The unauthenticated /unprotected/nova_error handler in cpsrvd places the status query value into an HTTP response without neutralizing carriage-return and line-feed sequences. Network access to the endpoint is sufficient; attacker-controlled headers can alter response handling, but no code execution or server compromise is reported.

The record

CVE
CVE-2026-32993
Published
May 13, 2026
Updated
May 13, 2026
Vendor
WebPros
Product
cPanel
Classifications
CWE-93, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record 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=11.132.0.0 <11.132.0.32
  2. Affected versionversion=11.134.0.0 <11.134.0.26
  3. Affected versionversion=11.136.0.0 <11.136.0.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

WebPros · cPanelversion=11.132.0.0 <11.132.0.32; version=11.134.0.0 <11.134.0.26; version=11.136.0.0 <11.136.0.10
WebPros · WP Squaredversion=11.132.1.0 <11.136.1.12

Published CVSS scores

8.3HackerOneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')
T1190Exploit Public-Facing Application

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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