CVE-2021-21208: debian debian_linux Improper Input Validation
Vulnerability summary
CVE-2021-21208 is a medium (CVSS 6.5) Improper Input Validation vulnerability in debian debian_linux. EPSS estimates a 1.40% chance of exploitation in the next 30 days, higher than 72.4% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 26-04-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
Insufficient data validation in QR scanner in Google Chrome on iOS prior to 90.0.4430.72 allowed an attacker displaying a QR code to perform domain spoofing via a crafted QR code.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS trend
Probability
1.40%
Chance of exploitation in the next 30 days
Percentile
72%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.40% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- chromium< 90.0.4430.72-1
- debian_linuxEOL10.0
Alpine1 product
- chromium< 90.0.4430.72-r0
Fedoraproject1 product
- fedoraEOL32 | 33 | 34
Google1 product
- chrome≥ unspecified, < 90.0.4430.72 | < 90.0.4430.72
Ubuntu1 product
- chromium-browser< 90.0.4430.72-0ubuntu0.16.04.1 | < 90.0.4430.72-0ubuntu0.18.04.1
5 vendors · 6 products
References
11 links- chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.htmlX Refsource MISCRelease NotesThird Party Advisory
