How severe is CVE-2018-9326?

CVE-2018-9326 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-2018-9326 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-9326?

CVE-2018-9326 affects Etherpad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-9326?

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-2018-9326 published?

CVE-2018-9326 was published on 2018-04-07 and last updated on 2026-06-17.

CVE-2018-9326

CVE-2018-9326 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Etherpad
Published: 2018-04-07
Last modified: 2026-06-17

Description

Etherpad 1.6.3 before 1.6.4 allows an attacker to execute arbitrary code.

Frequently asked questions

What is CVE-2018-9326?: Etherpad 1.6.3 before 1.6.4 allows an attacker to execute arbitrary code.
How severe is CVE-2018-9326?: CVE-2018-9326 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-2018-9326 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-9326?: CVE-2018-9326 affects Etherpad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-9326?: 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-2018-9326 published?: CVE-2018-9326 was published on 2018-04-07 and last updated on 2026-06-17.

References

http://blog.etherpad.org/2018/04/07/important-release-1-6-4/

Affected products (1)

cpe:2.3:a:etherpad:etherpad:1.6.3:*:*:*:*:*:*:*

More vulnerabilities in Etherpad

CVE-2021-43802 — Critical (CVSS 9.9): Etherpad is a real-time collaborative editor. In versions prior to 1.8.16, an attacker can craft an `*.etherpad` file…
CVE-2018-6835 — Critical (CVSS 9.8): node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass…
CVE-2018-9327 — High (CVSS 8.1): Etherpad 1.5.x and 1.6.x before 1.6.4 allows an attacker to execute arbitrary code on the server. The instance has to…
CVE-2020-22785 — High (CVSS 7.5): Etherpad < 1.8.3 is affected by a missing lock check which could cause a denial of service. Aggressively targeting…
CVE-2020-22782 — High (CVSS 7.5): Etherpad < 1.8.3 is affected by a denial of service in the import functionality. Upload of binary file to the import…
CVE-2020-22781 — High (CVSS 7.5): In Etherpad < 1.8.3, a specially crafted URI would raise an unhandled exception in the cache mechanism and cause a…

All CVEs affecting Etherpad →