How severe is CVE-2018-19960?

CVE-2018-19960 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-19960 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19960?

CVE-2018-19960 affects Onionshare. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19960?

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-2018-19960 published?

CVE-2018-19960 was published on 2018-12-07 and last updated on 2026-06-17.

CVE-2018-19960

CVE-2018-19960 is a high-severity vulnerability in Onionshare with a CVSS 3.x base score of 7.0. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.0)
CVSS v2: 4.4
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Onionshare
Published: 2018-12-07
Last modified: 2026-06-17

Description

The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is enabled, uses the /tmp/onionshare_server.log pathname for logging, which might allow local users to overwrite files or obtain sensitive information by using this pathname.

Frequently asked questions

What is CVE-2018-19960?: The debug_mode function in web/web.py in OnionShare through 1.3.1, when --debug is enabled, uses the /tmp/onionshare_server.log pathname for logging, which might allow local users to overwrite files or obtain sensitive information by using this pathname.
How severe is CVE-2018-19960?: CVE-2018-19960 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-19960 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19960?: CVE-2018-19960 affects Onionshare. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19960?: 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-2018-19960 published?: CVE-2018-19960 was published on 2018-12-07 and last updated on 2026-06-17.

References

https://bugs.debian.org/915859

Affected products (1)

cpe:2.3:a:onionshare:onionshare:*:*:*:*:*:*:*:*

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