CVE-2010-3870

PHP < 5.2.14 - Cross-Site Scripting and SQL Injection Protection Bypass via utf8_decode

Title source: llm

Exploitation Summary

EIP tracks 1 public exploit for CVE-2010-3870. PoCs published by [email protected].

AI-analyzed exploit summary This code demonstrates a vulnerability in PHP versions prior to 5.3.4 where insufficient input sanitization can lead to bypassing input-validation mechanisms. It uses a specific UTF-8 sequence to illustrate the issue but does not include an actual exploit payload.

Description

The utf8_decode function in PHP before 5.3.4 does not properly handle non-shortest form UTF-8 encoding and ill-formed subsequences in UTF-8 data, which makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string.

Exploits (1)

exploitdb WRITEUP VERIFIED

by [email protected] · phpremotephp

https://www.exploit-db.com/exploits/34950

View Code ZIP pw:eip

This code demonstrates a vulnerability in PHP versions prior to 5.3.4 where insufficient input sanitization can lead to bypassing input-validation mechanisms. It uses a specific UTF-8 sequence to illustrate the issue but does not include an actual exploit payload.

Classification

Writeup 90%

Attack Type

Other

Complexity

Trivial

Reliability

Theoretical

Target: PHP < 5.3.4

No auth needed

Prerequisites: PHP version prior to 5.3.4

MITRE ATT&CK

T1059 - Command and Scripting Interpreter

devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (33)

Core 33

Core References

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/11

Third Party Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2011/0077

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052836.html

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/42812

Mailing List, Third Party Advisory vendor-advisory x_refsource_hp

http://marc.info/?l=bugtraq&m=133469208622507&w=2

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/2

Third Party Advisory vendor-advisory x_refsource_redhat

http://www.redhat.com/support/errata/RHSA-2011-0195.html

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/4

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id?1024797

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2010-12/msg00000.html

Exploit, Vendor Advisory x_refsource_confirm

http://bugs.php.net/bug.php?id=49687

Exploit, Third Party Advisory x_refsource_misc

http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf

Mailing List, Third Party Advisory vendor-advisory x_refsource_apple

http://lists.apple.com/archives/security-announce/2011/Mar/msg00006.html

Third Party Advisory vendor-advisory x_refsource_ubuntu

http://www.ubuntu.com/usn/USN-1042-1

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/6

Third Party Advisory vendor-advisory x_refsource_redhat

http://www.redhat.com/support/errata/RHSA-2010-0919.html

Exploit, Vendor Advisory x_refsource_misc

http://bugs.php.net/bug.php?id=48230

Third Party Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2011/0021

Vendor Advisory x_refsource_confirm

http://www.php.net/ChangeLog-5.php

Exploit, Third Party Advisory x_refsource_misc

http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/1

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/42410

Third Party Advisory vendor-advisory x_refsource_mandriva

http://www.mandriva.com/en/security/advisories?name=MDVSA-2010:224

Mailing List, Third Party Advisory vendor-advisory x_refsource_fedora

http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052845.html

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/03/1

Patch, Vendor Advisory x_refsource_confirm

http://svn.php.net/viewvc?view=revision&revision=304959

Third Party Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2011/0020

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

http://www.openwall.com/lists/oss-security/2010/11/02/8

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/44605

Exploit, Vendor Advisory x_refsource_misc

http://us2.php.net/manual/en/function.utf8-decode.php#83935

Exploit, Third Party Advisory x_refsource_misc

http://www.acunetix.com/blog/web-security-articles/security-risks-associated-with-utf8_decode/

Third Party Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2010/3081

Third Party Advisory x_refsource_confirm

http://support.apple.com/kb/HT4581

Scores

EPSS 0.1128

EPSS Percentile 95.4%

Details

CWE

CWE-20

Status published

Products (6)

canonical/ubuntu_linux 6.06

canonical/ubuntu_linux 8.04

canonical/ubuntu_linux 9.10

canonical/ubuntu_linux 10.04

canonical/ubuntu_linux 10.10

php/php < 5.2.14

Published Nov 12, 2010

Tracked Since Feb 18, 2026