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TI-2021-03391 Aliases CVE-2021-20088GHSA-fw45-938v-p26j

Prototype pollution in mootools-more

Priority MEDIUM 41CWE-1321Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in mootools-more 1.6.0 allows a malicious user to inject properties into Object.prototype.

Why it matters now

EPSS 0.01449 73rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—mootools-more1.6.0—No fix listedCNA
—mootools-more (npm)up to 1.6.0—No fix listedGHSA-fw45-938v-p26j
  • mootools-more Vendor— Affected 1.6.0 Fixed in — No fix listed CNA
  • mootools-more (npm) Vendor— Affected up to 1.6.0 Fixed in — No fix listed GHSA-fw45-938v-p26j

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mootools:mootools-more:1.6.0:*:*:*:*:*:*:*1.6.0Vulnerablemootools
  • cpe:2.3:a:mootools:mootools-more:1.6.0:*:*:*:*:*:*:* Versions 1.6.0 Vulnerable ·mootools

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-20088
  2. 2026-10-03 Alias added: GHSA-fw45-938v-p26j

References

Exploit 1

Advisory 1

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences