How severe is CVE-2011-3865?

CVE-2011-3865 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-3865 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3865?

CVE-2011-3865 primarily affects Ulyssesonline Black-letterhead. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3865?

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

When was CVE-2011-3865 published?

CVE-2011-3865 was published on 2011-09-28 and last updated on 2026-06-16.

CVE-2011-3865

CVE-2011-3865 is a medium-severity vulnerability in Ulyssesonline Black-letterhead 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. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 3% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Ulyssesonline Black-letterhead
Published: 2011-09-28
Last modified: 2026-06-16

Description

Cross-site scripting (XSS) vulnerability in the Black-LetterHead theme before 1.6 for WordPress allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to index.php.

Frequently asked questions

What is CVE-2011-3865?: Cross-site scripting (XSS) vulnerability in the Black-LetterHead theme before 1.6 for WordPress allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to index.php.
How severe is CVE-2011-3865?: CVE-2011-3865 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-3865 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3865?: CVE-2011-3865 primarily affects Ulyssesonline Black-letterhead. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3865?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3865 published?: CVE-2011-3865 was published on 2011-09-28 and last updated on 2026-06-16.

References

https://sitewat.ch/en/Advisories/24

Affected products (5)

cpe:2.3:a:ulyssesonline:black-letterhead:*:*:*:*:*:*:*:*
cpe:2.3:a:ulyssesonline:black-letterhead:1.1:*:*:*:*:*:*:*
cpe:2.3:a:ulyssesonline:black-letterhead:1.2:*:*:*:*:*:*:*
cpe:2.3:a:ulyssesonline:black-letterhead:1.3:*:*:*:*:*:*:*
cpe:2.3:a:ulyssesonline:black-letterhead:1.4:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

103.253.245.96 (ipv4-addr)
47.251.12.114 (ipv4-addr)
64.202.190.35 (ipv4-addr)
45.56.218.235 (ipv4-addr)