CVE-2022-28345
mediumpriority · track · 31EPSS 0.025 · 85 %ileEUUSEPSS · scored 2026-10-28
The Signal app before 5.34 for iOS allows URI spoofing via RTLO injection. It incorrectly renders RTLO encoded URLs beginning with a non-breaking space, when there is a hash character in the URL. This technique allows a remote unauthenticated attacker to send legitimate looking links, appearing to be any website URL, by abusing the non-http/non-https automatic rendering of URLs. An attacker can spoof, for example, example.com, and masquerade any URL with a malicious destination. An attacker requires a subdomain such as gepj, txt, fdp, or xcod, which would appear backwards as jpeg, txt, pdf, and docx respectively.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (14)
External citations — patches, advisories, analysis.
- https://blog.malwarebytes.com/social-engineering/2022/03/uri-spoofing-flaw-could-phish-whatsapp-signal-instagram-and-imessage-users/cnnvd
- https://cxsecurity.com/cveshow/CVE-2022-28345/cnnvd
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-42.mdcnnvd
- https://github.com/zadewg/RIUScnnvd
- https://sick.codes/sick-2022-42cnnvd
- https://www.signalorg.com/Patchcnnvd
- https://blog.malwarebytes.com/social-engineering/2022/03/uri-spoofing-flaw-could-phish-whatsapp-signal-instagram-and-imessage-users/enisa_euvd
- https://github.com/sickcodes/security/blob/master/advisories/SICK-2022-42.mdenisa_euvd
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