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Vulnerability record · CVE-2007-1521 · published 20 March 2007

CVE-2007-1521: Php vulnerability

Php · Php

Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.

6.8 CVSS 2.0 Medium EPSS 8.5% · top 5.2%
6.8CVSS 2.0 base score
8.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
42References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.

AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://docs.info.apple.com/article.html?artnum=306172
http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html
http://secunia.com/advisories/24505 Vendor Advisory
http://secunia.com/advisories/25025 Vendor Advisory
http://secunia.com/advisories/25056
http://secunia.com/advisories/25057 Vendor Advisory
http://secunia.com/advisories/25062 Vendor Advisory
http://secunia.com/advisories/25445
http://secunia.com/advisories/26235
http://security.gentoo.org/glsa/glsa-200705-19.xml
http://us2.php.net/releases/4_4_7.php
http://us2.php.net/releases/5_2_2.php
http://www.debian.org/security/2007/dsa-1282
http://www.debian.org/security/2007/dsa-1283
http://www.novell.com/linux/security/advisories/2007_32_php.html
http://www.php-security.org/MOPB/MOPB-22-2007.html ExploitVendor Advisory
http://www.securityfocus.com/bid/22968
http://www.securityfocus.com/bid/25159
http://www.ubuntu.com/usn/usn-455-1
http://www.vupen.com/english/advisories/2007/0960
http://www.vupen.com/english/advisories/2007/2732
http://docs.info.apple.com/article.html?artnum=306172
http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html
http://secunia.com/advisories/24505 Vendor Advisory
http://secunia.com/advisories/25025 Vendor Advisory
http://secunia.com/advisories/25056
http://secunia.com/advisories/25057 Vendor Advisory
http://secunia.com/advisories/25062 Vendor Advisory
http://secunia.com/advisories/25445
http://secunia.com/advisories/26235
http://security.gentoo.org/glsa/glsa-200705-19.xml
http://us2.php.net/releases/4_4_7.php
http://us2.php.net/releases/5_2_2.php
http://www.debian.org/security/2007/dsa-1282
http://www.debian.org/security/2007/dsa-1283
http://www.novell.com/linux/security/advisories/2007_32_php.html
http://www.php-security.org/MOPB/MOPB-22-2007.html ExploitVendor Advisory
http://www.securityfocus.com/bid/22968
http://www.securityfocus.com/bid/25159
http://www.ubuntu.com/usn/usn-455-1

Track CVE-2007-1521 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2007-1521), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.