System	Score	Found at
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521
epss	0.06262	https://api.first.org/data/v1/epss?cve=CVE-2017-2521

Reference id	Reference type	URL
		https://api.first.org/data/v1/epss?cve=CVE-2017-2521
		https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2521
CVE-2017-2521	Exploit	https://bugs.chromium.org/p/project-zero/issues/detail?id=1165
CVE-2017-2521	Exploit	https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/linux/dos/42103.js

Data source	Exploit-DB
Date added	June 1, 2017
Description	WebKit JSC - 'JSObject::ensureLength' ensureLengthSlow Check Failure
Ransomware campaign use	Known
Source publication date	June 1, 2017
Exploit type	dos
Platform	linux
Source update date	June 1, 2017
Source URL	https://bugs.chromium.org/p/project-zero/issues/detail?id=1165

There are no known vectors.

Percentile	0.90535
EPSS Score	0.06262
Published At	July 30, 2025, 12:55 p.m.

Date	Actor	Action	Source	VulnerableCode Version
2025-07-31T11:59:05.092186+00:00	EPSS Importer	Import	https://epss.cyentia.com/epss_scores-current.csv.gz	37.0.0