CVE-2020-6830

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

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

For native-to-JS bridging, the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token was being used for JS-to-native also, but it isn't needed in this case, and its usage was also leaking this token. This vulnerability affects Firefox for iOS < 25.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

May 26, 2020

Last Modified

August 19, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Firefox for iOS 25 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2020-15/
generic

1632387 - (CVE-2020-6830) Firefox iOS Security Token Hijack By Overriding window.webkit

https://bugzilla.mozilla.org/show_bug.cgi?id=1632387

Vendor Advisories for CVE-2020-6830(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 29× 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 128 total refreshes for this CVE.

  1. 2026-08-19 17:00 UTCEPSS rescore
  2. 2026-08-19 15:56 UTCEG score recompute
  3. 2026-08-19 15:56 UTCGHSA enrichment
  4. 2026-08-18 13:44 UTCEPSS rescore
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  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:54 UTCEG score recompute
  4. 2026-07-22 22:40 UTCEG score recompute
  5. 2026-07-22 14:05 UTCEPSS rescore
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  25. 2026-07-11 08:25 UTCEPSS rescore
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  27. 2026-07-09 19:07 UTCEPSS rescore
  28. 2026-07-08 15:12 UTCEPSS rescore
  29. 2026-07-07 13:43 UTCEPSS rescore
  30. 2026-07-06 16:25 UTCEPSS rescore
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  39. 2026-06-30 23:20 UTCEPSS rescore
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  45. 2026-06-27 03:06 UTCEPSS rescore
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  51. 2026-06-23 21:31 UTCEPSS rescore
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  72. 2026-06-10 22:16 UTCEPSS rescore
  73. 2026-06-10 13:20 UTCEPSS rescore
  74. 2026-06-08 14:15 UTCEPSS rescore
  75. 2026-06-07 15:23 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2020-6830?
CVE-2020-6830 is a high vulnerability published on May 26, 2020. For native-to-JS bridging, the app requires a unique token to be passed that ensures non-app code can't call the bridging functions. That token was being used for JS-to-native also, but it isn't needed in this case, and its usage was also leaking this token. This vulnerability affects Firefox for…
When was CVE-2020-6830 disclosed?
CVE-2020-6830 was first published in the National Vulnerability Database on May 26, 2020, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-6830 actively exploited?
CVE-2020-6830 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.0% of all scored CVEs.
What is the CVSS score of CVE-2020-6830?
CVE-2020-6830 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2020-6830?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-6830, 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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