Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2011-4718

25
FAUCET Score

CVE-2011-4718 describes a session fixation vulnerability in the Sessions subsystem of PHP versions prior to 5.5.2, allowing remote attackers to hijack web sessions by specifying a session ID. With a CVSS score of 6.8, this vulnerability has a network attack vector, medium attack complexity, and can lead to partial compromise of confidentiality, integrity, and availability. There is no evidence of active exploitation, nor are there known public exploit codes or Metasploit modules, and community discussion is minimal.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.5.1CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.0.0:*:*:*:*:*:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.0.0:beta1:*:*:*:*:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.0.0:beta2:*:*:*:*:*:*
5.0.0CPE matchmatch criteria
cpe:2.3:a:php:php:5.0.0:beta3:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.60%
Probability of exploitation in next 30 days
EPSS Percentile
88.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0360 is in the 84th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (5)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: php54-php

Vendor Advisories (1)

redhatCVE-2011-4718Moderate

php: session fixation vulnerability allows remote hijacking of sessions

Nov 23, 2011

References

git.php.net
git.php.net
bugs.php.net / bug.php
wiki.php.net / rfc/strict_sessions