CVE-2017-5433

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 4%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

A use-after-free vulnerability in SMIL animation functions occurs when pointers to animation elements in an array are dropped from the animation controller while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox ESR < 52.1, and Firefox < 53.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: 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
Severity98% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
88.3%
KEV
Not listed

Published

June 11, 2018

Last Modified

November 25, 2025

Advisory Details (10)

Auto-updated Jun 28, 2026
Patch available. Sources: redhat.
generic

Security vulnerabilities fixed in Firefox ESR 52.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-12/
generic

Security vulnerabilities fixed in Firefox ESR 45.9 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-11/
generic

Security vulnerabilities fixed in Firefox 53 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2017-10/
generic

[SECURITY] [DSA 3831-1] firefox-esr security update

https://www.debian.org/security/2017/dsa-3831
generic

1347168 - (CVE-2017-5433) heap-use-after-free in nsSMILCompositor::GetFirstFuncToAffectSandwich

https://bugzilla.mozilla.org/show_bug.cgi?id=1347168
redhat Patch Available

Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:1201
redhat Patch Available

Affected: Red Hat Enterprise Linux 7.

https://access.redhat.com/errata/RHSA-2017:1106
redhat Patch Available

Affected: Red Hat Enterprise Linux 6.

https://access.redhat.com/errata/RHSA-2017:1104
generic
http://www.securitytracker.com/id/1038320
generic
http://www.securityfocus.com/bid/97940

Patch Availability(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuthunderbird (1:52.1.1+build1-0ubuntu0.17.04.1) @ zesty2026-05-28ubuntu
ubuntufirefox (53.0+build6-0ubuntu0.17.04.1) @ zesty2026-05-28ubuntu
redhatthunderbird-0:52.1.0-1.el7_32017-05-08redhat
redhatfirefox-0:52.1.0-2.el7_32017-04-21redhat
redhatfirefox-0:52.1.0-2.el6_92017-04-20redhat

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.

Weakness Classification(1)

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

All Vendor Advisories

(5)

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 15× in last 7d / 42× 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. 2026-07-23 01:29 UTCEG score recompute
  2. 2026-07-22 22:09 UTCEG score recompute
  3. 2026-07-22 14:04 UTCEPSS rescore
  4. 2026-07-22 14:04 UTCEPSS rescore
  5. 2026-07-21 15:21 UTCEPSS rescore
  6. 2026-07-21 15:21 UTCEPSS rescore
  7. 2026-07-21 11:47 UTCOSV refresh
  8. 2026-07-20 17:04 UTCEPSS rescore
  9. 2026-07-19 14:28 UTCEPSS rescore
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  1. 2026-07-06 02:20 UTCEPSS rescore
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  3. 2026-07-05 02:27 UTCEPSS rescore
  4. 2026-07-04 06:56 UTCOSV refresh
  5. 2026-07-04 06:28 UTCEPSS rescore
  6. 2026-07-02 16:54 UTCEPSS rescore
  7. 2026-07-01 15:02 UTCEPSS rescore
  8. 2026-06-30 23:19 UTCEPSS rescore
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  10. 2026-06-28 14:04 UTCEPSS rescore
  11. 2026-06-28 04:53 UTCEPSS rescore
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  17. 2026-06-23 21:30 UTCEPSS rescore
  18. 2026-06-21 14:54 UTCEPSS rescore
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  22. 2026-06-19 19:23 UTCEPSS rescore
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  24. 2026-06-18 17:50 UTCEPSS rescore
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  26. 2026-06-16 17:50 UTCEPSS rescore
  27. 2026-06-16 17:50 UTCEPSS rescore
  28. 2026-06-15 18:13 UTCOSV refresh
  29. 2026-06-15 17:45 UTCEPSS rescore
  30. 2026-06-14 23:14 UTCEPSS rescore
  31. 2026-06-13 22:57 UTCEPSS rescore
  32. 2026-06-12 23:09 UTCEPSS rescore
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  44. 2026-06-04 13:10 UTCEPSS rescore
  45. 2026-06-02 20:11 UTCEPSS rescore
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  47. 2026-05-31 22:28 UTCEPSS rescore
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  49. 2026-05-31 00:14 UTCEPSS rescore
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  51. 2026-05-29 13:41 UTCEPSS rescore
  52. 2026-05-28 13:42 UTCEPSS rescore
  53. 2026-05-28 13:42 UTCEPSS rescore
  54. 2026-05-28 06:56 UTCEG score recompute
  55. 2026-05-28 06:56 UTCVendor advisory
  56. 2026-05-28 06:55 UTCGHSA enrichment
  57. 2026-05-27 13:38 UTCEPSS rescore
  58. 2026-05-27 13:38 UTCEPSS rescore
  59. 2026-05-26 14:31 UTCOSV refresh
  60. 2026-05-26 13:42 UTCEPSS rescore
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  62. 2026-05-26 07:17 UTCEPSS rescore
  63. 2026-05-26 07:17 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-5433?
CVE-2017-5433 is a critical vulnerability published on June 11, 2018. A use-after-free vulnerability in SMIL animation functions occurs when pointers to animation elements in an array are dropped from the animation controller while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 45.9, Firefox…
When was CVE-2017-5433 disclosed?
CVE-2017-5433 was first published in the National Vulnerability Database on June 11, 2018, with the most recent update on November 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-5433 actively exploited?
CVE-2017-5433 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 88.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2017-5433?
CVE-2017-5433 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-5433?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-5433, 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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