Inappropriate implementation in Blink in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer pro…

published 2021-10-08 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-17550

cvss: 4.3; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

Inappropriate implementation in Blink in Google Chrome prior to 93.0.4577.82 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page.

Patch / fix

fixed in 1 distros 5

Google Chrome 93.0.4577.82

debian ubuntu opensuse alpine arch linux

chromium Debian 14, Debian 13, Debian 12 93.0.4577.82-1

debian advisories DEBIAN-CVE-2021-30630

chromium-browser Ubuntu 18.04 LTS 94.0.4606.71-0ubuntu0.18.04.1

ubuntu advisories UBUNTU-CVE-2021-30630

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

chromium openSUSE Tumbleweed 93.0.4577.82-1.1
nodejs-electron openSUSE Tumbleweed 13.5.0-1.1
chromium openSUSE Tumbleweed 113.0.5672.92-1.1
opera openSUSE Leap 15.4 NonFree 85.0.4341.28-lp154.2.5.1
nodejs-electron Package Hub 15 SP3, openSUSE Leap 15.3 16.0.9-bp153.2.1
opera openSUSE Leap 15.3 NonFree, openSUSE Leap 15.2 NonFree 79.0.4143.50-lp153.2.21.1
chromium openSUSE Leap 15.2 93.0.4577.82-lp152.2.125.1
chromium Package Hub 15 SP3, openSUSE Leap 15.3 93.0.4577.82-bp153.2.28.1

opensuse advisories openSUSE-SU-2024:10681-1 openSUSE-SU-2024:11550-1 openSUSE-SU-2024:12948-1 openSUSE-SU-2022:0110-1 openSUSE-SU-2022:0070-1 openSUSE-SU-2021:1330-1

chromium Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 93.0.4577.82-r0

alpine advisories ALPINE-CVE-2021-30630

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

vivaldi Arch Linux 4.2.2406.44-1
chromium Arch Linux 93.0.4577.82-1

arch linux advisories AVG-2337 AVG-2379

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-30630 updated 2025-11-21 cvss 8.8

chromium-browser: Inappropriate implementation in Blink

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:P/I:N/A:N

Affected products

Google Chrome

Classification

Weakness

CWE-346 Origin Validation Error

Technology feeds

Google Chrome rss critical rss

References

lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
vendor-advisory
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
vendor-advisory
chromereleases.googleblog.com /2021/09/stable-channel-update-for-desktop.html
release-notes, vendor-advisory
crbug.com /1244568
permissions-required, vendor-advisory

Sources

CVE List CVE-2021-30630
NVD CVE-2021-30630

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary