How severe is CVE-2018-6835?

CVE-2018-6835 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6835 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6835?

CVE-2018-6835 affects Etherpad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6835?

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

When was CVE-2018-6835 published?

CVE-2018-6835 was published on 2018-02-08 and last updated on 2026-06-17.

CVE-2018-6835

CVE-2018-6835 is a critical-severity vulnerability in Etherpad with a CVSS 3.x base score of 9.8. 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: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Etherpad
Published: 2018-02-08
Last modified: 2026-06-17

Description

node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass intended access restrictions.

Frequently asked questions

What is CVE-2018-6835?: node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass intended access restrictions.
How severe is CVE-2018-6835?: CVE-2018-6835 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6835 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6835?: CVE-2018-6835 affects Etherpad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6835?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6835 published?: CVE-2018-6835 was published on 2018-02-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:etherpad:etherpad:*:*:*:*:*:*:*:*

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