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NVD / CVE Program· CNA mitre

CVE-2020-15906: tiki-login.php in Tiki before 21.2 sets the admin password to a blank value after 50 invalid login attempts.

Noroxi assessment

Priority: Plan (action score 47/100)

  • A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 27.1% (FIRST EPSS); higher than 98% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

CriticalCVSS 9.8 · v3.1—Proof of concept No fix recorded
Published
Oct 22, 2020
Updated
Jun 16, 2026
EPSS
27.1% · 98th percentile

Report tools

JSON

Action score

47

Plan

Add it to your regular patch cycle.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
8 / 30 · 27.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2020-15906

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
tikitiki

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • tiki tiki16.3 and later · before 21.2

Same product

tiki: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-32461wikiplugin_includetpl in lib/wiki-plugins/wikiplugin_includetpl.php in Tiki before 28.3 mishandles input to an eval.
    39Monitor
  • CVE-2023-22850Tiki before 24.1, when the Spreadsheets feature is enabled, allows lib/sheet/grid.php PHP Object Injection because of an unserialize call.
    35Monitor
  • CVE-2023-22853Tiki before 24.1, when feature_create_webhelp is enabled, allows lib/structures/structlib.php PHP Object Injection because of an eval.
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2011-4558Jan 27, 2020 · Tiki 8.2 and earlier allows remote administrators to execute arbitrary PHP code via crafted input to the regexres and regex parameters.
    29Monitor
  • ← EarlierCVE-2020-16131Aug 3, 2020 · Tiki before 21.2 allows XSS because [\s\/"\'] is not properly considered in lib/core/TikiFilter/PreventXss.php.
    24Monitor
  • Later →CVE-2023-22852Jan 13, 2023 · Tiki through 25.0 allows CSRF attacks that are related to tiki-importer.php and tiki-import_sheet.php.
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Nuclei detection template ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Nuclei detection templateNuclei template CVE-2020-15906 —
Proof-of-concept repository on GitHubstars:522020-07-23

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-92 d
  2. Published
  3. TodayNov 1, 2026+2201 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-307 · Improper Restriction of Excessive Authentication Attempts

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records