HOMEVULNERABILITIESCVE-2016-5091
HIGH

CVE-2016-5091

CWE-254Published: January 23, 2017· Updated: Jun 17, 2026

8.1
CVSS v3.1

Official Description

Extbase in TYPO3 4.3.0 before 6.2.24, 7.x before 7.6.8, and 8.1.1 allows remote attackers to obtain sensitive information or possibly execute arbitrary code via a crafted Extbase action.

NVD Source

Technical Analysis

CVE-2016-5091 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

typo31 product(s)
typo3
Source: NVD CPE · 19 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013/
PATCHhttps://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013/
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/05/25/4
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/05/26/2
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/05/25/4
ADVISORYhttp://www.openwall.com/lists/oss-security/2016/05/26/2

All References (6)

→
http://www.openwall.com/lists/oss-security/2016/05/25/4Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/05/26/2Mailing List · Third Party Advisory
→
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013/Patch · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2016/05/25/4Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2016/05/26/2Mailing List · Third Party Advisory
→
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2016-013/Patch · Vendor Advisory

Quick Facts

CVE IDCVE-2016-5091
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-254
CISA KEVNo
Affected1 vendor(s)
PublishedJan 23, 2017

Related CVEs (CWE-254)

CVE-2015-3972
10.0
CVE-2016-5788
10.0
CVE-2015-1158
10.0
CVE-2015-8803
9.8
CVE-2015-8286
9.8
CVE-2016-1896
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2016-5091 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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