CVE-2019-17016

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 2.0%, top 21% of all CVEs by exploit prediction. 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: 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
Severity61% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
79%
KEV
Not listed

Published

January 8, 2020

Last Modified

November 21, 2024

References (50)

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:68.7.0+build1-0ubuntu0.16.04.2) @ xenial2026-05-27ubuntu
ubuntufirefox-mozsymbols (72.0.1+build1-0ubuntu0.16.04.1) @ xenial2026-05-27ubuntu
ubuntuxul-ext-lightning (1:68.4.1+build1-0ubuntu0.19.10.1) @ eoan2026-05-27ubuntu
redhatthunderbird-0:68.4.1-2.el8_02020-01-30redhat
redhatfirefox-0:68.4.1-1.el8_02020-01-30redhat
redhatthunderbird-0:68.4.1-2.el6_102020-01-16redhat
redhatthunderbird-0:68.4.1-2.el8_12020-01-16redhat
redhatthunderbird-0:68.4.1-2.el7_72020-01-16redhat
redhatfirefox-0:68.4.1-1.el8_12020-01-14redhat
redhatfirefox-0:68.4.1-1.el6_102020-01-13redhat
redhatfirefox-0:68.4.1-1.el7_72020-01-13redhat

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 7 ecosystems)
Debian:10(2)
PackageVulnerable rangeFixed inDependents
firefox-esr60.7.2esr-1 ... 68.4.1esr-1~deb9u1 (26 versions)68.4.1esr-1~deb10u1—
thunderbird1:60.7.2-1 ... 1:68.4.1-1~deb9u1 (29 versions)1:68.4.1-1~deb10u1—
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.4.0esr-1—
thunderbird—1:68.4.1-1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.4.0esr-1—
thunderbird—1:68.4.1-1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.4.0esr-1—
thunderbird—1:68.4.1-1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.4.0esr-1—
thunderbird—1:68.4.1-1—
Debian:8(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.0.1esr-1 ... 68.3.0esr-1~deb9u1 (166 versions)68.4.0esr-1~deb8u1—
thunderbird1.5-4 ... 1:68.3.1-1 (109 versions)1:68.4.1-1~deb8u1—
Debian:9(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.9.0esr-1 ... 68.4.1esr-1~deb8u1 (133 versions)68.4.1esr-1~deb9u1—
thunderbird1.5-4 ... 1:68.4.1-1~deb8u1 (110 versions)1:68.4.1-1~deb9u1—

Weakness Classification(1)

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

All Vendor Advisories

(11)

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 8× in last 7d / 27× 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 123 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2019-17016?
CVE-2019-17016 is a medium vulnerability published on January 8, 2020. When pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
When was CVE-2019-17016 disclosed?
CVE-2019-17016 was first published in the National Vulnerability Database on January 8, 2020, 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-2019-17016 actively exploited?
CVE-2019-17016 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 20.9% of all scored CVEs.
What is the CVSS score of CVE-2019-17016?
CVE-2019-17016 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2019-17016?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-17016, 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

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