How severe is CVE-2011-1134?

CVE-2011-1134 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2011-1134 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1134?

CVE-2011-1134 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2011-1134?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2011-1134 published?

CVE-2011-1134 was published on 2019-11-05 and last updated on 2026-06-16.

CVE-2011-1134

CVE-2011-1134 is a critical-severity vulnerability in S9y Serendipity with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: S9y Serendipity
Published: 2019-11-05
Last modified: 2026-06-16

Description

Cross-Site Scripting (XSS) in Xinha, as included in the Serendipity package before 1.5.5, allows remote attackers to execute arbitrary code in the image manager.

Frequently asked questions

What is CVE-2011-1134?: Cross-Site Scripting (XSS) in Xinha, as included in the Serendipity package before 1.5.5, allows remote attackers to execute arbitrary code in the image manager.
How severe is CVE-2011-1134?: CVE-2011-1134 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2011-1134 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1134?: CVE-2011-1134 affects S9y Serendipity. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2011-1134?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2011-1134 published?: CVE-2011-1134 was published on 2019-11-05 and last updated on 2026-06-16.

References

Affected products (1)

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

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