CVE-2018-11385

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 2.0% (80th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2.0%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.0%
EPSS %ILE
80th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

June 13, 2018

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Sep 16, 2026
Patch available.
generic

[SECURITY] Fedora 28 Update: php-symfony3-3.4.11-1.fc28 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WU5N2TZFNGXDGMXMPP7LZCWTFLENF6WH/
generic

[SECURITY] Fedora 28 Update: php-symfony4-4.0.11-1.fc28 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UBQK7JDXIELADIPGZIOUCZKMAJM5LSBW/
generic

[SECURITY] Fedora 28 Update: php-symfony-2.8.41-1.fc28 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G4XNBMFW33H47O5TZGA7JYCVLDBCXAJV/
genericMentions a patch (unverified)

[SECURITY] [DLA 1707-1] symfony security update

https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html
generic

[SECURITY] [DSA 4262-1] symfony security update

https://www.debian.org/security/2018/dsa-4262
generic

CVE-2018-11385: Session Fixation Issue for Guard Authentication (Symfony Blog)

https://symfony.com/blog/cve-2018-11385-session-fixation-issue-for-guard-authentication

Affected Packages

(9 across 7 ecosystems)
Packagist(3)
PackageVulnerable rangeFix by version rangeDependents
symfony/securityv4.0.0 ... v4.0.9 (11 versions)
  • 2.7.0 up to 2.7.48: fixed in 2.7.48
  • 2.8.0 up to 2.8.41: fixed in 2.8.41
  • 3.0.0 up to 3.3.17: fixed in 3.3.17
  • 3.4.0 up to 3.4.11: fixed in 3.4.11
  • 4.0.0 up to 4.0.11: fixed in 4.0.11
—
symfony/security-httpv4.0.0 ... v4.0.9 (11 versions)
  • 2.7.0 up to 2.7.48: fixed in 2.7.48
  • 2.8.0 up to 2.8.41: fixed in 2.8.41
  • 3.0.0 up to 3.3.17: fixed in 3.3.17
  • 3.4.0 up to 3.4.11: fixed in 3.4.11
  • 4.0.0 up to 4.0.11: fixed in 4.0.11
—
symfony/symfonyv4.0.0 ... v4.0.9 (11 versions)
  • 2.7.0 up to 2.7.48: fixed in 2.7.48
  • 2.8.0 up to 2.8.41: fixed in 2.8.41
  • 3.0.0 up to 3.3.17: fixed in 3.3.17
  • 3.4.0 up to 3.4.11: fixed in 3.4.11
  • 4.0.0 up to 4.0.11: fixed in 4.0.11
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.12+dfsg-1: fixed in 3.4.12+dfsg-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.12+dfsg-1: fixed in 3.4.12+dfsg-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.12+dfsg-1: fixed in 3.4.12+dfsg-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
symfony—
  • every version up to 3.4.12+dfsg-1: fixed in 3.4.12+dfsg-1
—
Debian:8(1)
PackageVulnerable rangeFix by version rangeDependents
symfony2.3.21+dfsg-4, 2.3.21+dfsg-4+deb8u1, 2.3.21+dfsg-4+deb8u2, 2.3.21+dfsg-4+deb8u3
  • every version up to 2.3.21+dfsg-4+deb8u4: fixed in 2.3.21+dfsg-4+deb8u4
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
symfony2.8.7+dfsg-1.3
  • every version up to 2.8.7+dfsg-1.3+deb9u1: fixed in 2.8.7+dfsg-1.3+deb9u1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 28× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 167 total refreshes for this CVE.

  1. 2026-10-09 20:02 UTCEPSS rescore
  2. 2026-10-08 16:36 UTCEPSS rescore
  3. 2026-10-07 23:41 UTCEPSS rescore
  4. 2026-10-06 15:12 UTCEPSS rescore
  5. 2026-10-05 17:39 UTCEPSS rescore
  6. 2026-10-04 23:18 UTCEPSS rescore
  7. 2026-10-03 14:21 UTCEPSS rescore
  8. 2026-09-30 14:59 UTCEPSS rescore
  9. 2026-09-30 09:52 UTCEG score recompute
  10. 2026-09-29 01:38 UTCOSV refresh
  11. 2026-09-28 13:45 UTCEPSS rescore
  12. 2026-09-27 13:40 UTCEPSS rescore
  13. 2026-09-27 13:40 UTCEPSS rescore
  14. 2026-09-26 15:53 UTCEPSS rescore
  15. 2026-09-26 00:19 UTCEPSS rescore
  16. 2026-09-24 13:59 UTCEPSS rescore
  17. 2026-09-23 13:42 UTCEPSS rescore
  18. 2026-09-21 20:27 UTCEPSS rescore
  19. 2026-09-19 15:36 UTCEPSS rescore
  20. 2026-09-18 19:22 UTCEPSS rescore
  21. 2026-09-17 19:22 UTCEPSS rescore
  22. 2026-09-16 14:03 UTCEPSS rescore
  23. 2026-09-16 05:06 UTCEPSS rescore
  24. 2026-09-15 03:05 UTCEPSS rescore
  25. 2026-09-13 16:42 UTCEPSS rescore
Show 75 more
  1. 2026-09-12 14:56 UTCEPSS rescore
  2. 2026-09-11 14:47 UTCEPSS rescore
  3. 2026-09-10 09:27 UTCEPSS rescore
  4. 2026-09-09 06:40 UTCOSV refresh
  5. 2026-09-07 15:57 UTCEPSS rescore
  6. 2026-09-06 13:43 UTCEPSS rescore
  7. 2026-09-05 15:24 UTCEPSS rescore
  8. 2026-09-04 13:56 UTCEPSS rescore
  9. 2026-09-04 05:02 UTCEPSS rescore
  10. 2026-09-02 14:07 UTCEPSS rescore
  11. 2026-09-02 14:07 UTCEPSS rescore
  12. 2026-09-01 13:49 UTCEPSS rescore
  13. 2026-09-01 03:31 UTCEPSS rescore
  14. 2026-08-30 19:13 UTCEPSS rescore
  15. 2026-08-28 21:36 UTCEPSS rescore
  16. 2026-08-27 14:21 UTCEPSS rescore
  17. 2026-08-26 14:41 UTCEPSS rescore
  18. 2026-08-25 13:44 UTCEPSS rescore
  19. 2026-08-23 00:14 UTCEPSS rescore
  20. 2026-08-22 14:37 UTCOSV refresh
  21. 2026-08-21 23:44 UTCEPSS rescore
  22. 2026-08-20 22:51 UTCEPSS rescore
  23. 2026-08-19 17:00 UTCEPSS rescore
  24. 2026-08-18 13:43 UTCEPSS rescore
  25. 2026-08-17 13:42 UTCEPSS rescore
  26. 2026-08-16 14:51 UTCEPSS rescore
  27. 2026-08-16 02:10 UTCEPSS rescore
  28. 2026-08-15 01:26 UTCEPSS rescore
  29. 2026-08-13 21:56 UTCEPSS rescore
  30. 2026-08-12 13:46 UTCEPSS rescore
  31. 2026-08-11 13:36 UTCEPSS rescore
  32. 2026-08-09 13:42 UTCEPSS rescore
  33. 2026-08-08 16:32 UTCEPSS rescore
  34. 2026-08-07 16:22 UTCEPSS rescore
  35. 2026-08-06 18:35 UTCOSV refresh
  36. 2026-08-06 13:42 UTCEPSS rescore
  37. 2026-08-06 13:42 UTCEPSS rescore
  38. 2026-08-04 15:05 UTCEPSS rescore
  39. 2026-08-02 02:23 UTCEPSS rescore
  40. 2026-08-01 04:12 UTCEPSS rescore
  41. 2026-07-30 16:24 UTCEPSS rescore
  42. 2026-07-30 01:27 UTCEPSS rescore
  43. 2026-07-28 15:32 UTCEPSS rescore
  44. 2026-07-26 14:51 UTCEPSS rescore
  45. 2026-07-26 14:51 UTCEPSS rescore
  46. 2026-07-24 14:14 UTCEPSS rescore
  47. 2026-07-23 14:15 UTCEPSS rescore
  48. 2026-07-23 14:15 UTCEPSS rescore
  49. 2026-07-23 01:32 UTCEG score recompute
  50. 2026-07-22 22:12 UTCEG score recompute
  51. 2026-07-22 14:04 UTCEPSS rescore
  52. 2026-07-21 15:21 UTCEPSS rescore
  53. 2026-07-21 10:47 UTCOSV refresh
  54. 2026-07-20 17:04 UTCEPSS rescore
  55. 2026-07-20 17:04 UTCEPSS rescore
  56. 2026-07-19 14:28 UTCEPSS rescore
  57. 2026-07-19 02:26 UTCEPSS rescore
  58. 2026-07-19 02:26 UTCEPSS rescore
  59. 2026-07-16 16:59 UTCEPSS rescore
  60. 2026-07-16 16:59 UTCEPSS rescore
  61. 2026-07-15 16:55 UTCEPSS rescore
  62. 2026-07-15 01:56 UTCEPSS rescore
  63. 2026-07-13 22:26 UTCEPSS rescore
  64. 2026-07-13 06:10 UTCEPSS rescore
  65. 2026-07-12 05:43 UTCEPSS rescore
  66. 2026-07-11 08:24 UTCEPSS rescore
  67. 2026-07-09 19:06 UTCEPSS rescore
  68. 2026-07-08 15:11 UTCEPSS rescore
  69. 2026-07-07 13:42 UTCEPSS rescore
  70. 2026-07-07 13:42 UTCEPSS rescore
  71. 2026-07-06 16:24 UTCEPSS rescore
  72. 2026-07-06 16:24 UTCEPSS rescore
  73. 2026-07-06 02:20 UTCEPSS rescore
  74. 2026-07-05 02:27 UTCEPSS rescore
  75. 2026-07-04 06:28 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2018-11385?
CVE-2018-11385 is a high vulnerability published on June 13, 2018. 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…
When was CVE-2018-11385 disclosed?
CVE-2018-11385 was first published on June 13, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-11385 actively exploited?
CVE-2018-11385 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.0% probability of exploitation in the next 30 days (80th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2018-11385?
CVE-2018-11385 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2018-11385?
A fix for CVE-2018-11385 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-11385

Explore →

Is Your Infrastructure Affected by CVE-2018-11385?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs