CVE-2019-11708

CRITICALNVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-05-23), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 10.0 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 56%CVSS: 10.0Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 0

A fix is available — apply it.

Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing arbitrary code on the user's computer. This vulnerability affects Firefox ESR < 60.7.2, Firefox < 67.0.4, and Thunderbird < 60.7.2.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
85(Attend)
EG Risk 85/100SSVC: Attend

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
Severity100% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
56%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

July 23, 2019

Last Modified

October 27, 2025

Advisory Details (5)

Auto-updated Aug 15, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Security vulnerabilities fixed in Thunderbird 60.7.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-20/
generic

Security vulnerabilities fixed in Firefox 67.0.4 and Firefox ESR 60.7.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-19/
generic

Mozilla Firefox: Multiple vulnerabilities (GLSA 201908-12) — Gentoo security

https://security.gentoo.org/glsa/201908-12
generic🔴 Active Exploitation

1559858 - (CVE-2019-11708) Sending `Prompt:Open` from the child allows for a sandbox escape

https://bugzilla.mozilla.org/show_bug.cgi?id=1559858
generic

Locked Out | Packet Storm

http://packetstormsecurity.com/files/155592/Mozilla-Firefox-Windows-64-Bit-Chain-Exploit.html

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:60.7.2+build2-0ubuntu0.19.04.1) @ disco2026-08-21ubuntu
ubuntufirefox-testsuite (67.0.4+build1-0ubuntu0.19.04.1) @ disco2026-08-21ubuntu
redhatfirefox-0:60.7.2-3.el8_02019-07-08redhat
redhatthunderbird-0:60.7.2-2.el7_62019-06-27redhat
redhatthunderbird-0:60.7.2-2.el6_102019-06-27redhat
redhatthunderbird-0:60.7.2-2.el8_02019-06-27redhat
redhatfirefox-0:60.7.2-1.el7_62019-06-25redhat
redhatfirefox-0:60.7.2-1.el6_102019-06-25redhat

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

(14 across 9 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—60.7.2esr-1—
thunderbird—1:60.7.2-1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—60.7.2esr-1—
thunderbird—1:60.7.2-1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—60.7.2esr-1—
thunderbird—1:60.7.2-1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—60.7.2esr-1—
thunderbird—1:60.7.2-1—
Debian:9(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.9.0esr-1 ... 60.7.1esr-1~deb9u1 (107 versions)60.7.2esr-1~deb9u1—
thunderbird1.5-4 ... 1:60.7.2-1~deb8u1 (81 versions)1:60.7.2-1~deb9u1—
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
mozjs6060.0.2-r0 ... 60.7.0-r0 (8 versions)60.7.2-r0—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
mozjs6060.0.2-r0 ... 60.7.0-r0 (8 versions)60.7.2-r0—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
mozjs6060.0.2-r0 ... 60.7.0-r0 (8 versions)60.7.2-r0—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
thunderbird1.5-4 ... 1:60.7.1-1~deb9u1 (80 versions)1:60.7.2-1~deb8u1—

Weakness Classification(1)

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

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 103× in last 7d / 379× 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 1,097 total refreshes for this CVE.

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

Publicly available exploits

(2 references)

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

  • Exploit-DBEDB-47752
    First seen Dec 7, 2019

    Mozilla FireFox (Windows 10 x64) - Full Chain Client Side Attack

    Open source ↗
  • GitHub PoC0vercl0k/CVE-2019-11708
    First seen Sep 29, 2019

    Full exploit chain (CVE-2019-11708 & CVE-2019-9810) against Firefox on Windows 64-bit.

    Open source ↗

Frequently asked(6)

What is CVE-2019-11708?
CVE-2019-11708 is a critical vulnerability published on July 23, 2019. Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxed parent process opening web content chosen by a compromised child process. When combined with additional vulnerabilities this could result in executing…
When was CVE-2019-11708 disclosed?
CVE-2019-11708 was first published in the National Vulnerability Database on July 23, 2019, with the most recent update on October 27, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-11708 actively exploited?
Yes. CISA added CVE-2019-11708 to the Known Exploited Vulnerabilities catalog on May 23, 2022, affecting Mozilla Firefox and Thunderbird. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2019-11708?
CVE-2019-11708 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2019-11708?
CVE-2019-11708 affects Mozilla Firefox and Thunderbird. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2019-11708?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-11708, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-11708

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