How severe is CVE-2018-9845?

CVE-2018-9845 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-2018-9845 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9845?

CVE-2018-9845 affects Etherpad Etherpad Lite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9845?

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-2018-9845 published?

CVE-2018-9845 was published on 2018-04-29 and last updated on 2026-06-17.

CVE-2018-9845

CVE-2018-9845 is a critical-severity vulnerability in Etherpad Etherpad Lite with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 13% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-178.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 13% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-178
Affected product: Etherpad Etherpad Lite
Published: 2018-04-29
Last modified: 2026-06-17

Description

Etherpad Lite before 1.6.4 is exploitable for admin access.

Frequently asked questions

What is CVE-2018-9845?: Etherpad Lite before 1.6.4 is exploitable for admin access.
How severe is CVE-2018-9845?: CVE-2018-9845 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-2018-9845 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 13% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9845?: CVE-2018-9845 affects Etherpad Etherpad Lite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9845?: 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-2018-9845 published?: CVE-2018-9845 was published on 2018-04-29 and last updated on 2026-06-17.

References

Affected products (1)

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

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