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CVE-2020-15906

57
FAUCET Score

CVE-2020-15906 describes a critical authentication bypass vulnerability in Tiki Wiki CMS GroupWare versions prior to 21.2. An attacker can exploit a flaw in tiki-login.php where 50 invalid login attempts reset the administrator password to a blank value. This allows for complete compromise of the affected system, as reflected by its CVSS score of 9.8 (Critical) and FAUCET Risk Score of 100/100. While not listed on CISA's KEV catalog, exploit intelligence indicates the availability of Nuclei templates for this vulnerability, and it has garnered significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 16.3, < 21.2CPE matchmatch criteria
cpe:2.3:a:tiki:tiki:*:*:*:*:*:*:*:*

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
27.36%
Probability of exploitation in next 30 days
EPSS Percentile
97.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
Nuclei: CVE-2020-15906 · Aug 20, 2024
This CVE's current EPSS score of 0.2736 is in the 95th 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

Patch Available

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/159663/Tiki-Wiki-CMS-Groupware-21.1-Authentication-Bypass.html
ExploitThird Party AdvisoryVDB Entry
info.tiki.org / article473-Security-Releases-of-all-Tiki-versions-since-16-3
PatchVendor Advisory