CVE-2024-11233Public exploitNetwork attack vector

Heap-byte disclosure or crash via missing bounds check

Published Nov 24, 2024 · Updated Nov 3, 2025

Out-of-bounds read in PHP 8.1 before 8.1.31, 8.2 before 8.2.26, and 8.3 before 8.3.14 allows remote attackers to disclose one heap byte or crash PHP. The php_conv_qprint_decode_convert routine in ext/standard/filters.c reads past the input buffer because a required bounds check is missing while certain filter sequences process crafted data. Exposure requires an application to pass attacker-controlled input through the convert.quoted-printable-decode filter, bounding the impact to one-byte disclosure or a PHP process crash.

CVSS severity4.8
Medium
EPSS probability1.61%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in PHP 8.1 before 8.1.31, 8.2 before 8.2.26, and 8.3 before 8.3.14 allows remote attackers to disclose one heap byte or crash PHP. The php_conv_qprint_decode_convert routine in ext/standard/filters.c reads past the input buffer because a required bounds check is missing while certain filter sequences process crafted data. Exposure requires an application to pass attacker-controlled input through the convert.quoted-printable-decode filter, bounding the impact to one-byte disclosure or a PHP process crash.

The record

CVE
CVE-2024-11233
Published
Nov 24, 2024
Updated
Nov 3, 2025
Vendor
The PHP Group
Product
PHP
Classifications
CWE-122, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 24, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.1.0 <8.1.31
  2. Affected versionversion=8.1.* <8.1.31
  3. Affected versionversion=8.2.0 <8.2.26
  4. Affected versionversion=8.2.* <8.2.26
  5. Affected versionversion=8.3.0 <8.3.14
  6. Affected versionversion=8.3.* <8.3.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The PHP Group · PHPversion=8.1.0 <8.1.31; version=8.1.* <8.1.31; version=8.2.0 <8.2.26; version=8.2.* <8.2.26; version=8.3.0 <8.3.14; version=8.3.* <8.3.14

Published CVSS scores

4.8GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/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 exploitPublished

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo