HOMEVULNERABILITIESCVE-2018-11406
HIGH

CVE-2018-11406

CWE-352Published: June 13, 2018· Updated: Jun 17, 2026

8.8
CVSS v3.1

Official Description

An issue was discovered in the Security component in Symfony 2.7.x before 2.7.48, 2.8.x before 2.8.41, 3.3.x before 3.3.17, 3.4.x before 3.4.11, and 4.0.x before 4.0.11. By default, a user's session is invalidated when the user is logged out. This behavior can be disabled through the invalidate_session option. In this case, CSRF tokens were not erased during logout which allowed for CSRF token fixation.

NVD Source

Technical Analysis

CVE-2018-11406 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 8.8.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

Debian1 product(s)
debian linux
sensiolabs1 product(s)
symfony
Source: NVD CPE · 2 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

ADVISORYhttps://symfony.com/blog/cve-2018-11406-csrf-token-fixation
ADVISORYhttps://www.debian.org/security/2018/dsa-4262
ADVISORYhttps://symfony.com/blog/cve-2018-11406-csrf-token-fixation
ADVISORYhttps://www.debian.org/security/2018/dsa-4262

All References (10)

→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
→
https://symfony.com/blog/cve-2018-11406-csrf-token-fixationVendor Advisory
→
https://www.debian.org/security/2018/dsa-4262Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
→
https://symfony.com/blog/cve-2018-11406-csrf-token-fixationVendor Advisory
→
https://www.debian.org/security/2018/dsa-4262Third Party Advisory

Quick Facts

CVE IDCVE-2018-11406
CVSS Score8.8 / 10
SeverityHIGH
WeaknessCWE-352
CISA KEVNo
Affected2 vendor(s)
PublishedJun 13, 2018

Related CVEs (CWE-352)

CVE-2017-5145
10.0
CVE-2025-23922
10.0
CVE-2025-32642
10.0
CVE-2023-51673
9.8
CVE-2019-14551
9.8
CVE-2019-17600
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-11406 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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