CVE-2021-20631
MEDIUMCVSS 6.5/10EPSS 0.74%
Last modified
CVE-2021-20631 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Improper input validation vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attacker to alter the data of Custom App via unspecified vectors.. EPSS estimates a 0.74% chance of exploitation in the next 30 days.
Description
Improper input validation vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attacker to alter the data of Custom App via unspecified vectors.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cybozu | Office | >= 10.0.0, <= 10.8.4 |
References
- https://jvn.jp/en/jp/JVN45797538/index.htmlThird Party Advisory
- https://kb.cybozu.support/article/36871/Vendor Advisory
- https://jvn.jp/en/jp/JVN45797538/index.htmlThird Party Advisory
- https://kb.cybozu.support/article/36871/Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20631?
Improper input validation vulnerability in Custom App of Cybozu Office 10.0.0 to 10.8.4 allows authenticated attacker to alter the data of Custom App via unspecified vectors.
How severe is CVE-2021-20631?
CVE-2021-20631 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.
How do I fix CVE-2021-20631?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-20626Improper access control vulnerability in Workflow of Cybozu …6.5
- CVE-2021-20627Cross-site scripting vulnerability in Address Book of Cybozu…6.1
- CVE-2021-20628Cross-site scripting vulnerability in Address Book of Cybozu…6.1
- CVE-2021-20629Cross-site scripting vulnerability in E-mail of Cybozu Offic…6.1
- CVE-2021-2063Vulnerability in the PeopleSoft Enterprise PeopleTools produ…8.4
- CVE-2021-20630Improper access control vulnerability in Phone Messages of C…4.3
- CVE-2021-20632Improper access control vulnerability in Bulletin Board of C…4.3
- CVE-2021-20633Improper access control vulnerability in Cabinet of Cybozu O…4.3
- CVE-2021-20634Improper access control vulnerability in Custom App of Cyboz…4.3
- CVE-2021-20635Improper restriction of excessive authentication attempts in…6.5
- CVE-2021-20636Cross-site request forgery (CSRF) vulnerability in LOGITEC L…6.5
- CVE-2021-20637Improper check or handling of exceptional conditions in LOGI…6.5
Are you affected by CVE-2021-20631?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST