What is CVE-2019-13950?

CVE-2019-13950 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-2019-13950?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Syguestbook A5 Project

CVE-2019-13950

index.php?c=admin&a=index in SyGuestBook A5 Version 1.2 has stored XSS via a reply to a comment.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-07-18 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.007 (51.7th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Syguestbook A5 Project — versions 1.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

fragrant10.github.io/2019/02/22/SyGuestBookA5代码审计.html (Exploit, Third Party Advisory)
github.com/fragrant10/fragrant10.github.io/blob/master/_posts/2019-02-22-SyGues… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-13950?: CVE-2019-13950 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-2019-13950?: Medium severity. CVSS v3 base score is 5.4 out of 10.