PT-2019-13487 · Syguestbook · Syguestbook

Published 2019-07-18 · Updated 2019-07-19 · CVE-2019-13948

Positive Technologies (AI Summary)

CVSS v3.1

5.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions SyGuestBook version 1.2

Description The issue arises from the isValidData function in include/functions.php not properly blocking XSS payloads, allowing for stored XSS attacks. This can be demonstrated by a crafted use of the onerror attribute of an IMG element.

Recommendations For SyGuestBook version 1.2, consider modifying the isValidData function in include/functions.php to properly block XSS payloads, or as a temporary workaround, restrict the use of the onerror attribute in IMG elements to minimize the risk of exploitation.

Exploit

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2019-13948

Affected Products

Syguestbook

References · 4

• 🔥 https://fragrant10.github.io/2019/02/22/SyGuestBookA5%E4%BB%A3%E7%A0%81%E5%AE%A1%E8%AE%A1.html · Exploit
• 🔥 https://github.com/fragrant10/fragrant10.github.io/blob/master/_posts/2019-02-22-SyGuestBookA5%E4%BB%A3%E7%A0%81%E5%AE%A1%E8%AE%A1.md · Exploit
• https://osv.dev/vulnerability/CVE-2019-13948 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-13948 · Security Note