Global infos:

The Qyrr WordPress plugin before 0.7 does not escape the data-uri of the QR Code when outputting it in a src attribute, allowing for Cross-Site Scripting attacks. Furthermore, the data_uri_to_meta AJAX action, available to all authenticated users, only had a CSRF check in place, with the nonce available to users with a role as low as Contributor allowing any user with such role (and above) to set a malicious data-uri in arbitrary QR Code posts, leading to a Stored Cross-Site Scripting issue.

CVE Status: Modified

References:

[email protected]

af854a3a-2127-422b-91ae-364da2661108

Metrics:

Attribute	Value
Attack Complexity	LOW
Attack Vector	NETWORK
Availability Impact	NONE
Base Score	5.4
Base Severity	MEDIUM
Confidentiality Impact	LOW
Integrity Impact	LOW
Privileges Required	LOW
Scope	CHANGED
User Interaction	REQUIRED
Vector String	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Exploitability Score	2.3
Impact Score	2.7
Source	[email protected]
Type	Primary

Links:

Exploit-db
Github