What is CVE-2015-8603?

CVE-2015-8603 is a medium-severity vulnerability in S9y Serendipity, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2016-01-12.

How severe is CVE-2015-8603?

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

XSS in S9y Serendipity

CVE-2015-8603

Cross-site scripting (XSS) vulnerability in Serendipity before 2.0.3 allows remote attackers to inject arbitrary web script or HTML via the serendipity[entry_id] parameter in an "edit" admin action to serendipity_admin.php.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2016-01-12 · 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: 0.012 (66.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

S9y Serendipity

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.securityfocus.com/archive/1/537248/100/0/threaded (mailing-list)
packetstormsecurity.com/files/135164/Serendipity-2.0.2-Cross-Site-Scripting.html (Exploit)
seclists.org/fulldisclosure/2016/Jan/18 (mailing-list)
blog.s9y.org/archives/266-Serendipity-2.0.3-released.html (Vendor Advisory)

Frequently asked questions

What is CVE-2015-8603?: CVE-2015-8603 is a medium-severity vulnerability in S9y Serendipity, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2016-01-12.
How severe is CVE-2015-8603?: Medium severity. CVSS v3 base score is 5.4 out of 10.