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CVE-2020-5616

32
FAUCET Score

CVE-2020-5616 describes an authentication bypass vulnerability affecting multiple free edition products including Calendar01, PKOBO-News01, and Gallery01. This critical vulnerability (CVSS 9.8) allows remote attackers to gain administrative privileges without authentication, posing a significant risk to confidentiality, integrity, and availability. While the attack vector is network-based and low complexity, there is currently no public exploit code, Metasploit modules, or evidence of active exploitation. Community discussion and media coverage for this CVE are also minimal.

Impacted Technologies

VendorProductVersion(s)CPE
1.0.0CPE matchmatch criteria
cpe:2.3:a:calendar01_project:calendar01:1.0.0:*:*:*:free:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:calendar02_project:calendar02:1.0.0:*:*:*:free:*:*:*
<= 1.0.3CPE matchmatch criteria
cpe:2.3:a:calendarform01_project:calendarform01:*:*:*:*:free:*:*:*
<= 1.0.3CPE matchmatch criteria
cpe:2.3:a:gallery01_project:gallery01:*:*:*:*:free:*:*:*
1.0.0CPE matchmatch criteria
cpe:2.3:a:link01_project:link01:1.0.0:*:*:*:free:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.06%
Probability of exploitation in next 30 days
EPSS Percentile
86.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0306 is in the 78th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN73169744/index.html
Third Party Advisory
php-factory.net / calendar/01.php
ProductThird Party Advisory
php-factory.net / calendar/02.php
ProductThird Party Advisory
php-factory.net / calendar_form/01.php
ProductThird Party Advisory
php-factory.net / gallery/01.php
ProductThird Party Advisory
php-factory.net / link/01.php
ProductThird Party Advisory
php-factory.net / news/pkobo-news01.php
ProductThird Party Advisory
php-factory.net / telop/01.php
ProductThird Party Advisory
php-factory.net / vote/01.php
ProductThird Party Advisory