CVE-2010-4657

Name: CVE-2010-4657
Creator: NVD / NIST
Published: 2019-11-13T21:15:11.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.54%

Last modified Jun 16, 2026

CVE-2010-4657 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. PHP5 before 5.4.4 allows passing invalid utf-8 strings via the xmlTextWriterWriteAttribute, which are then misparsed by libxml2. This results in memory leak into the resulting output.. EPSS estimates a 1.54% chance of exploitation in the next 30 days.

Description

PHP5 before 5.4.4 allows passing invalid utf-8 strings via the xmlTextWriterWriteAttribute, which are then misparsed by libxml2. This results in memory leak into the resulting output.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

1.54%

71.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-772

Affected Software

Vendor	Product	Versions
Php	Php	>= 5.0.0, < 5.4.4
Redhat	Enterprise Linux	5.0
Redhat	Enterprise Linux	6.0
Debian	Debian Linux	8.0

References

https://access.redhat.com/security/cve/cve-2010-4657Third Party Advisory
https://bugs.launchpad.net/php/%2Bbug/655442Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4657Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2010-4657Third Party Advisory
https://access.redhat.com/security/cve/cve-2010-4657Third Party Advisory
https://bugs.launchpad.net/php/%2Bbug/655442Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4657Issue Tracking, Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2010-4657Third Party Advisory

Timeline

Published: Nov 13, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2010-4657?

PHP5 before 5.4.4 allows passing invalid utf-8 strings via the xmlTextWriterWriteAttribute, which are then misparsed by libxml2. This results in memory leak into the resulting output.

How severe is CVE-2010-4657?

CVE-2010-4657 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.54% probability of exploitation in the next 30 days.

How do I fix CVE-2010-4657?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2010-4657?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST