MEDIUM
CVE-2021-20625
NVD-CWE-OtherPublished: March 18, 2021· Updated: Jun 17, 2026
4.3
CVSS v3.1
Official Description
Improper access control vulnerability in Bulletin Board of Cybozu Office 10.0.0 to 10.8.4 allows an authenticated attacker to bypass access restriction and alter the data of Bulletin Board via unspecified vectors.
Technical Analysis
CVE-2021-20625 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Affected Vendors & Products
cybozu1 product(s)
office
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://jvn.jp/en/jp/JVN45797538/index.htmlThird Party Advisory
→
https://kb.cybozu.support/article/36874/Vendor Advisory
→
https://jvn.jp/en/jp/JVN45797538/index.htmlThird Party Advisory
→
https://kb.cybozu.support/article/36874/Vendor Advisory
Quick Facts
CVE IDCVE-2021-20625
CVSS Score4.3 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedMar 18, 2021
Related CVEs (NVD-CWE-Other)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-20625 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.