High severity8.8NVD Advisory· Published Apr 23, 2021· Updated Jun 17, 2026
CVE-2021-20088
CVE-2021-20088
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
mootools-morenpm | <= 1.6.0 | — |
Affected products
3- cpe:2.3:a:mootools:mootools-more:1.6.0:*:*:*:*:*:*:*
- mootools-more/mootools-moredescription
Patches
Vulnerability mechanics
References
3- github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/mootools-more.mdnvdExploitThird Party AdvisoryWEB
- github.com/advisories/GHSA-fw45-938v-p26jghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-20088ghsaADVISORY
News mentions
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