CVE-2023-5590Public exploitNetwork attack vector

Driver crash via null cookie-name dereference

Published Oct 15, 2023 · Updated Sep 16, 2024

Null pointer dereference in Selenium before 4.14.0 allows remote attackers to crash IE Driver during cookie retrieval from a crafted page. CookieWndProc constructs a C++ std::wstring directly from an INTERNETCOOKIE2 pwszName pointer without first checking whether the name pointer is null. Exposure requires a WebDriver session using IE Driver or Edge IE mode to retrieve cookies from an attacker-controlled page; the documented consequence is an IE Driver crash, not data access or modification.

CVSS severity7.5
High
EPSS probability0.86%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Selenium before 4.14.0 allows remote attackers to crash IE Driver during cookie retrieval from a crafted page. CookieWndProc constructs a C++ std::wstring directly from an INTERNETCOOKIE2 pwszName pointer without first checking whether the name pointer is null. Exposure requires a WebDriver session using IE Driver or Edge IE mode to retrieve cookies from an attacker-controlled page; the documented consequence is an IE Driver crash, not data access or modification.

The record

CVE
CVE-2023-5590
Published
Oct 15, 2023
Updated
Sep 16, 2024
Vendor
Selenium
Product
Selenium
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=unspecified <4.14.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Selenium · Seleniumversion=unspecified <4.14.0

Published CVSS scores

7.5huntr.devCVSS:3.0/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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