CVE-2015-8124

MEDIUMCVSS v2 · 6.86.8—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 6.8 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:M/Au:N/C:P/I:P/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 2.7% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.

Sources: epss, nvd_v2
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 3%CVSS v2: 6.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Session fixation vulnerability in the "Remember Me" login feature in Symfony 2.3.x before 2.3.35, 2.6.x before 2.6.12, and 2.7.x before 2.7.7 allows remote attackers to hijack web sessions via a session id.

CVSS v2.0 (legacy)
6.8MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
6.8(low)
EG Risk
36(Track)
EG Risk 36/100SSVC: Track

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
Severity68% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
3%
EPSS %ILE
84%
KEV
Not listed

Published

December 7, 2015

Last Modified

May 6, 2026

References (14)

Affected Packages

(3 across 1 ecosystem)
Packagist(3)
PackageVulnerable rangeFixed inDependents
symfony/securityv2.7.0 ... v2.7.6 (7 versions)2.7.7—
symfony/security-httpv2.7.0 ... v2.7.6 (7 versions)2.7.7—
symfony/symfonyv2.7.0 ... v2.7.6 (7 versions)2.7.7—

Data Freshness Timeline

(refreshed 12× in last 7d / 41× 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 105 total refreshes for this CVE.

  1. 2026-07-26 14:50 UTCEPSS rescore
  2. 2026-07-26 13:55 UTCEG score recompute▲ 6.80
  3. 2026-07-25 14:13 UTCEPSS rescore
  4. 2026-07-24 14:13 UTCEPSS rescore
  5. 2026-07-23 14:14 UTCEPSS rescore
  6. 2026-07-23 01:19 UTCEG score recompute
  7. 2026-07-23 00:21 UTCEG score recompute
  8. 2026-07-22 21:59 UTCEG score recompute
  9. 2026-07-22 14:04 UTCEPSS rescore
  10. 2026-07-21 15:21 UTCEPSS rescore
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  24. 2026-07-12 13:37 UTCOSV refresh
  25. 2026-07-12 05:42 UTCEPSS rescore
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  1. 2026-07-11 08:23 UTCEPSS rescore
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  22. 2026-06-23 21:30 UTCEPSS rescore
  23. 2026-06-23 18:50 UTCOSV refresh
  24. 2026-06-22 14:23 UTCEPSS rescore
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  26. 2026-06-21 14:54 UTCEPSS rescore
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  42. 2026-06-11 13:57 UTCEPSS rescore
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  44. 2026-06-10 22:15 UTCEPSS rescore
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  46. 2026-06-08 14:14 UTCEPSS rescore
  47. 2026-06-07 15:22 UTCEPSS rescore
  48. 2026-06-07 02:29 UTCOSV refresh
  49. 2026-06-06 13:45 UTCEPSS rescore
  50. 2026-06-05 22:44 UTCEPSS rescore
  51. 2026-06-05 06:08 UTCEPSS rescore
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  53. 2026-06-04 13:10 UTCEPSS rescore
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  56. 2026-06-01 13:49 UTCEPSS rescore
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  58. 2026-05-31 22:28 UTCEPSS rescore
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  69. 2026-05-24 16:43 UTCEPSS rescore
  70. 2026-05-22 22:27 UTCEG score recompute
  71. 2026-05-22 21:15 UTCEPSS rescore
  72. 2026-05-22 18:13 UTCOSV refresh
  73. 2026-05-21 22:40 UTCEPSS rescore
  74. 2026-05-20 22:37 UTCEPSS rescore
  75. 2026-05-20 22:37 UTCEPSS rescore

Frequently asked(4)

What is CVE-2015-8124?
CVE-2015-8124 is a medium vulnerability published on December 7, 2015. Session fixation vulnerability in the "Remember Me" login feature in Symfony 2.3.x before 2.3.35, 2.6.x before 2.6.12, and 2.7.x before 2.7.7 allows remote attackers to hijack web sessions via a session id.
When was CVE-2015-8124 disclosed?
CVE-2015-8124 was first published in the National Vulnerability Database on December 7, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8124 actively exploited?
CVE-2015-8124 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3% probability of exploitation in the next 30 days, which ranks it in the top 15.6% of all scored CVEs.
How do I remediate CVE-2015-8124?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2015-8124, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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