How severe is CVE-2025-8101?

CVE-2025-8101 has a CVSS 4.0 base score of 8.8, rated high severity.

Is CVE-2025-8101 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-8101?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-8101 have an EU (EUVD) identifier?

Yes. CVE-2025-8101 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22758.

When was CVE-2025-8101 published?

CVE-2025-8101 was published on 2025-07-25 and last updated on 2026-06-17.

CVE-2025-8101

CVE-2025-8101 is a high-severity vulnerability with a CVSS 4.0 base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1321.

Key facts

Severity: High (CVSS 4.0 base score 8.8)
EPSS exploit prediction: 1% (39th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22758
Weakness: CWE-1321
Published: 2025-07-25
Last modified: 2026-06-17

Description

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Linkify (linkifyjs) allows XSS Targeting HTML Attributes and Manipulating User-Controlled Variables.This issue affects Linkify: from 4.3.1 before 4.3.2.

Frequently asked questions

What is CVE-2025-8101?: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability in Linkify (linkifyjs) allows XSS Targeting HTML Attributes and Manipulating User-Controlled Variables.This issue affects Linkify: from 4.3.1 before 4.3.2.
How severe is CVE-2025-8101?: CVE-2025-8101 has a CVSS 4.0 base score of 8.8, rated high severity.
Is CVE-2025-8101 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-8101?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-8101 have an EU (EUVD) identifier?: Yes. CVE-2025-8101 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22758.
When was CVE-2025-8101 published?: CVE-2025-8101 was published on 2025-07-25 and last updated on 2026-06-17.

References

Other CWE-1321 (Prototype Pollution) vulnerabilities

CVE-2026-25142 — Critical (CVSS 10.0): SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__…
CVE-2024-39008 — Critical (CVSS 10.0): robinweser fast-loops v1.1.3 was discovered to contain a prototype pollution via the function objectMergeDeep. This…
CVE-2024-38999 — Critical (CVSS 10.0): jrburke requirejs v2.3.6 was discovered to contain a prototype pollution via the function s.contexts._.configure. This…
CVE-2022-29823 — Critical (CVSS 10.0): Feather-Sequalize cleanQuery method uses insecure recursive logic to filter unsupported keys from the query object.…
CVE-2022-24760 — Critical (CVSS 10.0): Parse Server is an open source http web server backend. In versions prior to 4.10.7 there is a Remote Code Execution…
CVE-2020-12079 — Critical (CVSS 10.0): Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution. This occurs because Electron…

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