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Vulnerability record · CVE-2020-15906 · published 22 October 2020

CVE-2020-15906: Tiki improper restriction of authentication attempts vulnerability

Tiki · Tiki

tiki-login.php in Tiki before 21.2 sets the admin password to a blank value after 50 invalid login attempts.

9.8 CVSS 3.1 Critical EPSS 27% · top 2.0% CWE-307 · Improper restriction of authentication attempts
9.8CVSS 3.1 base score, v2 7.5
27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

tiki-login.php in Tiki before 21.2 sets the admin password to a blank value after 50 invalid login attempts.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-22850Tiki deserialization of untrusted data vulnerabilityTiki before 24.1, when the Spreadsheets feature is enabled, allows lib/sheet/grid.php PHP Object Injection because of an unserialize call.EPSS 1.2%8.8CVE-2023-22853Tiki code injection vulnerabilityTiki before 24.1, when feature_create_webhelp is enabled, allows lib/structures/structlib.php PHP Object Injection because of an eval.EPSS 0.94%8.8CVE-2018-7304Tiki csv injection vulnerabilityTiki 17.1 does not validate user input for special characters; consequently, a CSV Injection attack can open a CMD.EXE or Calculator window on the vi…EPSS 1.2%7.2CVE-2023-22851Tiki unrestricted file upload vulnerabilityTiki before 24.2 allows lib/importer/tikiimporter_blog_wordpress.php PHP Object Injection by an admin because of an unserialize call.EPSS 1.0%7.2CVE-2011-4558Tiki injection vulnerabilityTiki 8.2 and earlier allows remote administrators to execute arbitrary PHP code via crafted input to the regexres and regex parameters.EPSS 4.3%6.5CVE-2023-22852Tiki cross-site request forgery vulnerabilityTiki through 25.0 allows CSRF attacks that are related to tiki-importer.php and tiki-import_sheet.php.EPSS 0.32%6.1CVE-2020-16131Tiki cross-site scripting vulnerabilityTiki before 21.2 allows XSS because [\s\/"\'] is not properly considered in lib/core/TikiFilter/PreventXss.php.EPSS 0.69%6.1CVE-2011-4455Tiki cross-site scripting vulnerabilityMultiple cross-site scripting vulnerabilities in Tiki 7.2 and earlier allow remote attackers to inject arbitrary web script or HTML via the path info…EPSS 0.95%

Source: NIST National Vulnerability Database (record CVE-2020-15906), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.