CVE-2023-25927Network attack vector

Authenticated WebSEAL process crash

Published May 12, 2023 · Updated Nov 3, 2025

Improper input validation in WebSEAL in IBM Security Verify Access 10.0.0 through 10.0.5 allows remote authenticated users to crash webseald. The webseald process accepts a specially crafted HTTP request and terminates, but IBM has not disclosed the affected parser, field, or rejected validation rule. A network-reachable authenticated session is required, and exploitation interrupts access while the process is down without a reported confidentiality or integrity impact.

CVSS severity6.5
Medium
EPSS probability1.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in WebSEAL in IBM Security Verify Access 10.0.0 through 10.0.5 allows remote authenticated users to crash webseald. The webseald process accepts a specially crafted HTTP request and terminates, but IBM has not disclosed the affected parser, field, or rejected validation rule. A network-reachable authenticated session is required, and exploitation interrupts access while the process is down without a reported confidentiality or integrity impact.

The record

CVE
CVE-2023-25927
Published
May 12, 2023
Updated
Nov 3, 2025
Vendor
IBM
Product
IBM Security Verify Access
Classifications
CWE-20, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 12, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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=10.0.0, 10.0.1, 10.0.2, 10.0.3, 10.0.4, 10.0.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

IBM · IBM Security Verify Accessversion=10.0.0, 10.0.1, 10.0.2, 10.0.3, 10.0.4, 10.0.5

Published CVSS scores

6.5IBM CorporationCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499Endpoint Denial of Service

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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