XSS in Syguestbook A5 Project

CVE-2019-13948

SyGuestBook A5 Version 1.2 allows stored XSS because the isValidData function in include/functions.php does not properly block XSS payloads, as demonstrated by a crafted use of the onerror attribute of an IMG element.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (50.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2019-13948?
CVE-2019-13948 is a medium-severity vulnerability in Syguestbook A5 Project, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-07-18.
How severe is CVE-2019-13948?
Medium severity. CVSS v3 base score is 5.4 out of 10.