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…

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.

Scores

EPSS (exploitation in 30 days)

11.3% · top 4.0% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.

Weakness

• n/a
• CWE-20 (opens in a new tab)All about CWE-20 and its CVEs

Affected products

• n/a

  • affected n/a

References (33)

• [oss-security] 20101102 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• ADV-2011-0077 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• FEDORA-2010-19011 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• 42812 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• HPSBOV02763 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
• [oss-security] 20101102 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2011:0195 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• [oss-security] 20101102 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 1024797 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
• SUSE-SR:2010:023 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
• http://bugs.php.net/bug.php?id=49687 (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://www.blackhat.com/presentations/bh-usa-09/VELANAVA/BHUSA09-VelaNava-FavoriteXSS-SLIDES.pdf (opens in a new tab)x_refsource_MISCx_transferred
• APPLE-SA-2011-03-21-1 (opens in a new tab)vendor-advisoryx_refsource_APPLEx_transferred
• USN-1042-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
• [oss-security] 20101102 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• RHSA-2010:0919 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
• http://bugs.php.net/bug.php?id=48230 (opens in a new tab)x_refsource_MISCx_transferred
• ADV-2011-0021 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://www.php.net/ChangeLog-5.php (opens in a new tab)x_refsource_CONFIRMx_transferred
• http://sirdarckcat.blogspot.com/2009/10/couple-of-unicode-issues-on-php-and.html (opens in a new tab)x_refsource_MISCx_transferred
• [oss-security] 20101102 utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 42410 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• MDVSA-2010:224 (opens in a new tab)vendor-advisoryx_refsource_MANDRIVAx_transferred
• FEDORA-2010-18976 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
• [oss-security] 20101103 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• http://svn.php.net/viewvc?view=revision&revision=304959 (opens in a new tab)x_refsource_CONFIRMx_transferred
• ADV-2011-0020 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• [oss-security] 20101102 Re: utf-8 security issue in php (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• 44605 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://us2.php.net/manual/en/function.utf8-decode.php#83935 (opens in a new tab)x_refsource_MISCx_transferred
• http://www.acunetix.com/blog/web-security-articles/security-risks-associated-with-utf8_decode/ (opens in a new tab)x_refsource_MISCx_transferred
• ADV-2010-3081 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
• http://support.apple.com/kb/HT4581 (opens in a new tab)x_refsource_CONFIRMx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2010-3870](https://trackcve.app/badge/CVE-2010-3870.svg)](https://trackcve.app/cve/CVE-2010-3870)

Record last updated 7 Aug 2024, 03:26 UTC.