Symfony Session Fixation Vulnerability
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.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | 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 |
| Composer package | 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 |
| Composer package | 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 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2018-11385
- https://github.com/symfony/symfony/commit/194caff28b56707ea98e746c6582c06acbb9bc3f
- https://github.com/symfony/symfony/commit/fa5bf4b17d45ee32f41bd1a9abc3fb6c134ec89b
- https://github.com/symfony/symfony/commit/fad1e1f2ea336e85c889feece9d0e23fbfcf777d
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2018-11385.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security/CVE-2018-11385.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2018-11385.yaml
- https://github.com/symfony/symfony
- https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH
- https://symfony.com/blog/cve-2018-11385-session-fixation-issue-for-guard-authentication
- https://symfony.com/cve-2018-11385
- https://www.debian.org/security/2018/dsa-4262
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-384- Platform
- Composer
- Package
symfony/security, symfony/security-http, symfony/symfony- Disclosed
- 14.05.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-g4rg-rw65-8hfg - CC BY 4.0
Vulnerability history: symfony/security-http
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 20
- First → latest
- 12.2019 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 10
- Medium 8
- Low 2
Disclosures per year
- 2019: 1
- 2020: 2
- 2021: 3
- 2022: 7
- 2023: 1
- 2024: 1
- 2025: 0
- 2026: 5
-
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