How severe is CVE-2020-9903?

CVE-2020-9903 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-9903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9903?

CVE-2020-9903 primarily affects Apple Safari. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-9903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-9903 published?

CVE-2020-9903 was published on 2020-10-16 and last updated on 2026-06-17.

CVE-2020-9903

CVE-2020-9903 is a high-severity vulnerability in Apple Safari with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-346.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Apple Safari
Published: 2020-10-16
Last modified: 2026-06-17

Description

A logic issue was addressed with improved restrictions. This issue is fixed in iOS 13.6 and iPadOS 13.6, Safari 13.1.2. A malicious attacker may cause Safari to suggest a password for the wrong domain.

Frequently asked questions

What is CVE-2020-9903?: A logic issue was addressed with improved restrictions. This issue is fixed in iOS 13.6 and iPadOS 13.6, Safari 13.1.2. A malicious attacker may cause Safari to suggest a password for the wrong domain.
How severe is CVE-2020-9903?: CVE-2020-9903 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-9903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9903?: CVE-2020-9903 primarily affects Apple Safari. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-9903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-9903 published?: CVE-2020-9903 was published on 2020-10-16 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*

More vulnerabilities in Apple Safari

CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2015-5780 — Critical (CVSS 10.0): The Safari Extensions implementation in Apple Safari before 9 does not require user confirmation before replacing an…
CVE-2014-1303 — Critical (CVSS 10.0): Heap-based buffer overflow in Apple Safari 7.0.2 allows remote attackers to execute arbitrary code and bypass a sandbox…
CVE-2014-1300 — Critical (CVSS 10.0): Unspecified vulnerability in Apple Safari 7.0.2 on OS X allows remote attackers to execute arbitrary code with root…
CVE-2011-3046 — Critical (CVSS 10.0): The extension subsystem in Google Chrome before 17.0.963.78 does not properly handle history navigation, which allows…
CVE-2010-3116 — Critical (CVSS 10.0): Multiple use-after-free vulnerabilities in WebKit, as used in Apple Safari before 4.1.3 and 5.0.x before 5.0.3, Google…

All CVEs affecting Apple Safari →

Other CWE-346 vulnerabilities

CVE-2026-42901 — Critical (CVSS 10.0): Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-6508 — Critical (CVSS 9.8): Origin Validation Error vulnerability in TUBITAK BILGEM Software Technologies Research Institute Liderahenk allows…
CVE-2026-2790 — Critical (CVSS 9.8): Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 148, Firefox ESR…
CVE-2022-50925 — Critical (CVSS 9.8): Prowise Reflect version 1.0.9 contains a remote keystroke injection vulnerability that allows attackers to send…
CVE-2025-30466 — Critical (CVSS 9.8): This issue was addressed through improved state management. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS…
CVE-2024-8487 — Critical (CVSS 9.8): A Cross-Origin Resource Sharing (CORS) vulnerability exists in modelscope/agentscope version v0.0.4. The CORS…

Browse all CWE-346 vulnerabilities →