How severe is CVE-2015-8603?

CVE-2015-8603 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2015-8603 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-8603?

CVE-2015-8603 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-8603?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-8603 published?

CVE-2015-8603 was published on 2016-01-12 and last updated on 2026-06-17.

CVE-2015-8603

CVE-2015-8603 is a medium-severity vulnerability in S9y Serendipity with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: S9y Serendipity
Published: 2016-01-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2015-8603?: CVE-2015-8603 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2015-8603 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-8603?: CVE-2015-8603 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-8603?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-8603 published?: CVE-2015-8603 was published on 2016-01-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:s9y:serendipity:*:*:*:*:*:*:*:*

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