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Fencer Vulns
high 8.1

CVE-2018-11385 json

Symfony Session Fixation Vulnerability

published 2018-06-13 8 y ago modified 2026-06-17 4 mo ago also GHSA-g4rg-rw65-8hfg , EUVD-2022-3887

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist symfony/symfony 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  • packagist symfony/security-http 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  • packagist symfony/security 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  • sensiolabs symfony 2.7.48, 2.8.41, 3.3.17, 3.4.11, 4.0.11
  • symfony Debian 14, Debian 13, Debian 12 3.4.12+dfsg-1

debian advisories DEBIAN-CVE-2018-11385

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-11385 updated

php-symfony: Multiple flaws

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.97% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P
GitHub 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist symfony/symfony
>=2.7.0, <2.7.48
>=2.8.0, <2.8.41
>=3.0.0, <3.3.17
>=3.4.0, <3.4.11
>=4.0.0, <4.0.11
2.7.48
2.8.41
3.3.17
3.4.11
4.0.11
packagist symfony/security-http
>=2.7.0, <2.7.48
>=2.8.0, <2.8.41
>=3.0.0, <3.3.17
>=3.4.0, <3.4.11
>=4.0.0, <4.0.11
2.7.48
2.8.41
3.3.17
3.4.11
4.0.11
packagist symfony/security
>=2.7.0, <2.7.48
>=2.8.0, <2.8.41
>=3.0.0, <3.3.17
>=3.4.0, <3.4.11
>=4.0.0, <4.0.11
2.7.48
2.8.41
3.3.17
3.4.11
4.0.11

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.