HOMEVULNERABILITIESCVE-2020-5616
CRITICAL

CVE-2020-5616

CWE-287Published: August 4, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official Description

[Calendar01], [Calendar02], [PKOBO-News01], [PKOBO-vote01], [Telop01], [Gallery01], [CalendarForm01], and [Link01] [Calendar01] free edition ver1.0.0, [Calendar02] free edition ver1.0.0, [PKOBO-News01] free edition ver1.0.3 and earlier, [PKOBO-vote01] free edition ver1.0.1 and earlier, [Telop01] free edition ver1.0.0, [Gallery01] free edition ver1.0.3 and earlier, [CalendarForm01] free edition ver1.0.3 and earlier, and [Link01] free edition ver1.0.0 allows remote attackers to bypass authentication and log in to the product with administrative privileges via unspecified vectors.

NVD Source

Technical Analysis

CVE-2020-5616 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

calendar01_project1 product(s)
calendar01
calendar02_project1 product(s)
calendar02
calendarform01
gallery01_project1 product(s)
gallery01
link01_project1 product(s)
link01
pkobo-news01
pkobo-vote01
telop01_project1 product(s)
telop01
Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

All References (18)

https://www.php-factory.net/calendar/01.phpProduct · Third Party Advisory
https://www.php-factory.net/calendar/02.phpProduct · Third Party Advisory
https://www.php-factory.net/gallery/01.phpProduct · Third Party Advisory
https://www.php-factory.net/link/01.phpProduct · Third Party Advisory
https://www.php-factory.net/telop/01.phpProduct · Third Party Advisory
https://www.php-factory.net/vote/01.phpProduct · Third Party Advisory
https://www.php-factory.net/calendar/01.phpProduct · Third Party Advisory
https://www.php-factory.net/calendar/02.phpProduct · Third Party Advisory
https://www.php-factory.net/gallery/01.phpProduct · Third Party Advisory
https://www.php-factory.net/link/01.phpProduct · Third Party Advisory

Quick Facts

CVE IDCVE-2020-5616
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-287
CISA KEVNo
Affected8 vendor(s)
PublishedAug 4, 2020

Related CVEs (CWE-287)

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2020-5616 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. CVE data is provided under the NVD usage policy.