CVE-2015-8866 describes a critical vulnerability in PHP versions before 5.5.22 and 5.6.6, specifically when PHP-FPM is utilized. This flaw, located in ext/libxml/libxml.c, allows attackers to conduct XML External Entity (XXE) and XML Entity Expansion (XEE) attacks by exploiting a lack of thread isolation for libxml_disable_entity_loader changes. Affected products include canonical, opensuse, php, and suse. With a CVSS score of 9.6 (CRITICAL), this vulnerability is easily exploitable over the network with low attack complexity, requiring user interaction. Successful exploitation can lead to complete compromise of confidentiality, integrity, and availability. The associated CWE is CWE-611. Despite its high severity, there is no evidence of active exploitation, and it is not listed in the CISA KEV catalog. There are no known public exploits (Metasploit, Nuclei, ExploitDB), and it has received minimal community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 5.5.0, < 5.5.22CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | ||
>= 5.6.0, < 5.6.6CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | ||
>= 7.0.0, < 7.0.27CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | ||
>= 7.1.0, < 7.1.13CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* | ||
>= 7.2.0, < 7.2.1CPE matchmatch criteria | cpe:2.3:a:php:php:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
No social media mentions found for this CVE.
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.