How severe is CVE-2004-2157?

CVE-2004-2157 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2004-2157 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2004-2157?

CVE-2004-2157 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2004-2157?

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

When was CVE-2004-2157 published?

CVE-2004-2157 was published on 2004-12-31 and last updated on 2026-06-16.

CVE-2004-2157

CVE-2004-2157 is a medium-severity vulnerability in S9y Serendipity with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: S9y Serendipity
Published: 2004-12-31
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in Comment.php in Serendipity 0.7 beta1, and possibly other versions before 0.7-beta3, allows remote attackers to inject arbitrary HTML and PHP code via the (1) email or (2) username field.

Frequently asked questions

What is CVE-2004-2157?: Cross-site scripting (XSS) vulnerability in Comment.php in Serendipity 0.7 beta1, and possibly other versions before 0.7-beta3, allows remote attackers to inject arbitrary HTML and PHP code via the (1) email or (2) username field.
How severe is CVE-2004-2157?: CVE-2004-2157 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2004-2157 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2004-2157?: CVE-2004-2157 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2004-2157?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2004-2157 published?: CVE-2004-2157 was published on 2004-12-31 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:s9y:serendipity:0.7_beta1:*:*:*:*:*:*:*

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