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CVE-2016-5091

25
FAUCET Score

CVE-2016-5091 describes a critical vulnerability in the Extbase framework of TYPO3 versions 4.3.0 through 6.2.23, 7.x through 7.6.7, and 8.1.1. This flaw allows remote attackers to obtain sensitive information or potentially execute arbitrary code through a specially crafted Extbase action. With a CVSS v3 score of 8.1 (High), it presents a significant risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 6.2.23CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:*:*:*:*:*:*:*:*
7.0.0CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:7.0.0:*:*:*:*:*:*:*
7.0.2CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:7.0.2:*:*:*:*:*:*:*
7.1.0CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:7.1.0:*:*:*:*:*:*:*
7.2.0CPE matchmatch criteria
cpe:2.3:a:typo3:typo3:7.2.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.57%
Probability of exploitation in next 30 days
EPSS Percentile
83.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0257 is in the 41st percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: typo3/cms-extbaseFixed in: 6.2.24
composerpatch availablevia ghsa
Product: typo3/cms-extbaseFixed in: 7.6.8

Vendor Advisories (1)

composerGHSA-jxg5-35fj-ccwfhigh

Extbase for TYPO3 allows RCE

May 17, 2022

References

typo3.org / teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013
PatchVendor Advisory
openwall.com / lists/oss-security/2016/05/25/4
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/05/26/2
Mailing ListThird Party Advisory