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CVE-2020-20093

23
FAUCET Score

CVE-2020-20093 is a URI spoofing vulnerability affecting Facebook Messenger for iOS (version 227.0 and prior) and Android (version 228.1.0.10.116 and prior). This medium-severity vulnerability (CVSS 6.5) allows attackers to craft messages that visually misrepresent URIs, potentially leading to phishing attacks. While there is no known active exploitation or public exploit code, the vulnerability has garnered some community discussion and media coverage, indicating awareness of its potential impact.

Impacted Technologies

VendorProductVersion(s)CPE
<= 227.0CPE matchmatch criteria
cpe:2.3:a:facebook:messenger:*:*:*:*:*:iphone_os:*:*
<= 228.1.0.10.116CPE matchmatch criteria
cpe:2.3:a:facebook:messenger:*:*:*:*:*:android:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.31%
Probability of exploitation in next 30 days
EPSS Percentile
81.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0231 is in the 91st percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

packetstormsecurity.com / files/166448/RTLO-Injection-URI-Spoofing.html
ExploitThird Party AdvisoryVDB Entry
github.com / zadewg/RIUS
ExploitThird Party Advisory