CVE-2015-0816

MEDIUMCVSS v2 · 5.05.0—
EchelonGraph scoreLOW confidence

This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — 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:L/Au:N/C:N/I:P/A:N. 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 66.9% 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
Weaponized
5.0EG
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 67%
  • Public exploit code is available (Metasploit, Exploit-DB (verified), epss top5pct, epss high, public exploit)
CISA-KEV: Not listedEPSS PROB: 67%CVSS v2: 5.0Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · epss high · public exploitExposed services: Not assessed

A fix is available — apply it.

Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as demonstrated by the resource: URL associated with PDF.js.

CVSS v2.0 (legacy)
5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
EG Score
5.0MEDIUMlow confidence
EG Risk
54
EG Risk 54/100CISA 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
Severity50% × 45%
Exploitation67% × 40%
Automatability30% × 15%
CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.
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
67%
EPSS %ILE
99th
KEV
Not listed

CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.

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

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). 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

April 1, 2015

Last Modified

May 6, 2026

References (36)

Vendor Advisories for CVE-2015-0816(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:31.6.0+build1-0ubuntu0.14.04.1) @ trusty2026-05-23ubuntu
ubuntufirefox-testsuite (37.0+build2-0ubuntu0.14.04.1) @ trusty2026-05-23ubuntu
redhatxulrunner-0:31.6.0-2.el7_12015-04-01redhat
redhatthunderbird-0:31.6.0-1.el7_12015-04-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 1 ecosystem)
Debian:7(2)
PackageVulnerable rangeFixed inDependents
icedove10.0.12-1 ... 31.5.0-1~deb7u1 (53 versions)31.6.0-1~deb7u1—
iceweasel10.0.12esr-1 ... 31.5.3esr-1~deb7u1 (121 versions)31.6.0esr-1~deb7u1—

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 4× in last 7d / 17× 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.

  1. 2026-10-03 14:21 UTCEPSS rescore
  2. 2026-10-01 19:43 UTCEPSS rescore
  3. 2026-09-30 14:58 UTCEPSS rescore
  4. 2026-09-30 09:01 UTCEG score recompute
  5. 2026-09-27 13:40 UTCEPSS rescore
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  7. 2026-09-26 15:53 UTCEPSS rescore
  8. 2026-09-20 20:08 UTCEPSS rescore
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  10. 2026-09-18 19:22 UTCEPSS rescore
  11. 2026-09-17 19:21 UTCEPSS rescore
  12. 2026-09-15 03:05 UTCEPSS rescore
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  14. 2026-09-11 09:31 UTCEPSS rescore
  15. 2026-09-10 09:26 UTCEPSS rescore
  16. 2026-09-06 13:42 UTCEPSS rescore
  17. 2026-09-05 15:23 UTCEPSS rescore
  18. 2026-09-02 14:07 UTCEPSS rescore
  19. 2026-08-30 19:12 UTCEPSS rescore
  20. 2026-08-27 14:20 UTCEPSS rescore
  21. 2026-08-26 14:41 UTCEPSS rescore
  22. 2026-08-21 23:44 UTCEPSS rescore
  23. 2026-08-20 22:50 UTCEPSS rescore
  24. 2026-08-19 16:59 UTCEPSS rescore
  25. 2026-08-16 02:09 UTCEPSS rescore
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  1. 2026-08-15 01:25 UTCEPSS rescore
  2. 2026-08-12 13:46 UTCEPSS rescore
  3. 2026-08-07 16:22 UTCEPSS rescore
  4. 2026-08-06 13:42 UTCEPSS rescore
  5. 2026-07-30 16:23 UTCEPSS rescore
  6. 2026-07-30 01:26 UTCEPSS rescore
  7. 2026-07-28 15:31 UTCEPSS rescore
  8. 2026-07-26 14:50 UTCEPSS rescore
  9. 2026-07-26 13:53 UTCEG score recompute▲ 5.00
  10. 2026-07-24 14:13 UTCEPSS rescore
  11. 2026-07-23 14:14 UTCEPSS rescore
  12. 2026-07-23 01:15 UTCEG score recompute▼ 6.00
  13. 2026-07-23 00:18 UTCEG score recompute▲ 6.00
  14. 2026-07-22 21:57 UTCEG score recompute▼ 9.00
  15. 2026-07-22 14:04 UTCEPSS rescore
  16. 2026-07-21 15:21 UTCEPSS rescore
  17. 2026-07-21 15:21 UTCEPSS rescore
  18. 2026-07-20 17:03 UTCEPSS rescore
  19. 2026-07-19 02:26 UTCEPSS rescore
  20. 2026-07-19 02:26 UTCEPSS rescore
  21. 2026-07-16 16:59 UTCEPSS rescore
  22. 2026-07-16 16:59 UTCEPSS rescore
  23. 2026-07-15 16:54 UTCEPSS rescore
  24. 2026-07-15 16:54 UTCEPSS rescore
  25. 2026-07-13 22:26 UTCEPSS rescore
  26. 2026-07-12 05:42 UTCEPSS rescore
  27. 2026-07-09 19:05 UTCEPSS rescore
  28. 2026-07-06 16:24 UTCEPSS rescore
  29. 2026-07-04 06:27 UTCEPSS rescore
  30. 2026-07-01 15:02 UTCEPSS rescore
  31. 2026-07-01 15:02 UTCEPSS rescore
  32. 2026-06-28 04:53 UTCEPSS rescore
  33. 2026-06-27 03:05 UTCEPSS rescore
  34. 2026-06-25 13:47 UTCEPSS rescore
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  36. 2026-06-24 14:02 UTCEPSS rescore
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  38. 2026-06-23 21:30 UTCEPSS rescore
  39. 2026-06-18 17:50 UTCEPSS rescore
  40. 2026-06-18 17:49 UTCEPSS rescore
  41. 2026-06-17 17:49 UTCEPSS rescore
  42. 2026-06-16 17:50 UTCEPSS rescore
  43. 2026-06-16 17:49 UTCEPSS rescore
  44. 2026-06-15 17:45 UTCEPSS rescore
  45. 2026-06-12 23:09 UTCEPSS rescore
  46. 2026-06-10 22:15 UTCEPSS rescore
  47. 2026-06-06 13:45 UTCEPSS rescore
  48. 2026-06-05 22:44 UTCEPSS rescore
  49. 2026-06-05 06:08 UTCEPSS rescore
  50. 2026-06-05 06:08 UTCEPSS rescore
  51. 2026-06-04 13:10 UTCEPSS rescore
  52. 2026-06-04 13:09 UTCEPSS rescore
  53. 2026-06-02 20:10 UTCEPSS rescore
  54. 2026-06-02 20:10 UTCEPSS rescore
  55. 2026-05-31 00:14 UTCEPSS rescore
  56. 2026-05-28 13:42 UTCEPSS rescore
  57. 2026-05-28 13:42 UTCEPSS rescore
  58. 2026-05-26 13:41 UTCEPSS rescore
  59. 2026-05-26 13:41 UTCEPSS rescore
  60. 2026-05-23 02:02 UTCEG score recompute
  61. 2026-05-23 02:02 UTCVendor advisory
  62. 2026-05-23 02:02 UTCGHSA enrichment
  63. 2026-05-22 21:15 UTCEPSS rescore
  64. 2026-05-22 21:15 UTCEPSS rescore
  65. 2026-05-21 22:40 UTCEPSS rescore
  66. 2026-05-20 22:37 UTCEPSS rescore
  67. 2026-05-20 22:37 UTCEPSS rescore
  68. 2026-05-20 11:21 UTCEPSS rescore
  69. 2026-05-20 11:21 UTCEPSS rescore
  70. 2026-05-20 11:21 UTCEPSS rescore
  71. 2026-05-18 21:30 UTCEPSS rescore
  72. 2026-05-18 21:30 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-37958✓ verified
    First seen Aug 24, 2015

    Mozilla Firefox - 'pdf.js' Privileged JavaScript Injection (Metasploit)

    Open source ↗
  • Metasploitexploit/multi/browser/firefox_pdfjs_privilege_escalation✓ verified
    First seen Mar 31, 2015

    Firefox PDF.js Privileged Javascript Injection

    Open source ↗

Related CVEs(same product + same vendor)

Frequently asked(4)

What is CVE-2015-0816?
CVE-2015-0816 is a medium vulnerability published on April 1, 2015. Mozilla Firefox before 37.0, Firefox ESR 31.x before 31.6, and Thunderbird before 31.6 do not properly restrict resource: URLs, which makes it easier for remote attackers to execute arbitrary JavaScript code with chrome privileges by leveraging the ability to bypass the Same Origin Policy, as…
When was CVE-2015-0816 disclosed?
CVE-2015-0816 was first published on April 1, 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-2015-0816 actively exploited?
CVE-2015-0816 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 67% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
How do I remediate CVE-2015-0816?
A fix for CVE-2015-0816 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2015-0816 are linked in the Vendor Advisories panel on this page.

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