No exploitation reportedFix available

CVE-2018-11385

Q: Is CVE-2018-11385 actively exploited?

Active exploitation of CVE-2018-11385 has not been confirmed. Its EPSS score was 2.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-11385?

CVE-2018-11385 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2018-06-13
Fixed in4.0.11 · 3.4.11 · 3.3.17 · 2.8.41 · 2.7.48
WeaknessCWE-384

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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. A session fixation vulnerability within the "Guard" login feature may allow an attacker to impersonate a victim towards the web application if the session id value was previously known to the attacker.

Timeline

dates in UTC

2018-06-1316:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-11385?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-11385?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Symfony

Branch	Affected	Fixed in	Source
4.0	≥ 4.0.0, < 4.0.11	4.0.11	NVD · OSV
3.4	≥ 3.4.0, < 3.4.11	3.4.11	NVD · OSV
3.3	≥ 3.3.0, < 3.3.17	3.3.17	NVD
3.x	≥ 3.0.0, < 3.3.17	3.3.17	OSV
2.8	≥ 2.8.0, < 2.8.41	2.8.41	NVD · OSV
2.7	≥ 2.7.0, < 2.7.48	2.7.48	NVD · OSV

Debian debian linux

Branch	Affected	Fixed in	Source
8.0	= 8.0	no fix published	NVD
9.0	= 9.0	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
28.x	= 28	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Symfony to 4.0.11 · 3.4.11 · 3.3.17 · 2.8.41 · 2.7.48

Advisories and patches

symfony.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.08.1read 2026-10-23
NVDCVSS 2.06.8read 2026-10-23
NVDweakness (CWE)CWE-384read 2026-10-23
FIRST EPSSEPSS score2.0 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2018-06-13
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2018-11385?

Is CVE-2018-11385 actively exploited?

Active exploitation of CVE-2018-11385 has not been confirmed. Its EPSS score was 2.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-11385?

CVE-2018-11385 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

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