CVE-2020-22781
CVE-2020-22781 is a high-severity vulnerability in Etherpad 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-89.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (62nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-89
- Affected product: Etherpad
- Published:
- Last modified:
Description
In Etherpad < 1.8.3, a specially crafted URI would raise an unhandled exception in the cache mechanism and cause a denial of service (crash the instance).
Frequently asked questions
- What is CVE-2020-22781?
- In Etherpad < 1.8.3, a specially crafted URI would raise an unhandled exception in the cache mechanism and cause a denial of service (crash the instance).
- How severe is CVE-2020-22781?
- CVE-2020-22781 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 none, and availability high.
- Is CVE-2020-22781 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-22781?
- CVE-2020-22781 affects Etherpad. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-22781?
- 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-2020-22781 published?
- CVE-2020-22781 was published on 2021-04-28 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:etherpad:etherpad:*:*:*:*:*:*:*:*
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