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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-20728

19
FAUCET Score

CVE-2021-20728 is an improper access control vulnerability affecting goo blog App for Android versions 1.2.25 and earlier, and iOS versions 1.3.3 and earlier. This flaw allows a remote attacker to redirect users to arbitrary websites through the vulnerable application. Rated Medium severity with a CVSS score of 5.3, the vulnerability has a network attack vector, low attack complexity, and a potential impact of low integrity, meaning it could lead to unauthorized modification of data. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.2.25CPE matchmatch criteria
cpe:2.3:a:nttr:goo_blog:*:*:*:*:*:android:*:*
<= 1.3.3CPE matchmatch criteria
cpe:2.3:a:nttr:goo_blog:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.99%
Probability of exploitation in next 30 days
EPSS Percentile
59.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0099 is in the 37th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.goo.ne.jp / staffblog/e/d84a6b220222462094728301782885db
Vendor Advisory
jvn.jp / en/jp/JVN91691168/index.html
Third Party Advisory