How severe is CVE-2011-1838?

CVE-2011-1838 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-1838 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-1838?

CVE-2011-1838 primarily affects Twiki. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-1838?

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

When was CVE-2011-1838 published?

CVE-2011-1838 was published on 2011-05-20 and last updated on 2026-06-16.

CVE-2011-1838

CVE-2011-1838 is a medium-severity vulnerability in Twiki 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% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Twiki
Published: 2011-05-20
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in TemplateLogin.pm in TWiki before 5.0.2 allow remote attackers to inject arbitrary web script or HTML via the origurl parameter to a (1) view script or (2) login script.

Frequently asked questions

What is CVE-2011-1838?: Multiple cross-site scripting (XSS) vulnerabilities in TemplateLogin.pm in TWiki before 5.0.2 allow remote attackers to inject arbitrary web script or HTML via the origurl parameter to a (1) view script or (2) login script.
How severe is CVE-2011-1838?: CVE-2011-1838 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-1838 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-1838?: CVE-2011-1838 primarily affects Twiki. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-1838?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-1838 published?: CVE-2011-1838 was published on 2011-05-20 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:a:twiki:twiki:*:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.0:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.1:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.2:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.3:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.4:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.0.5:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.1.0:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.1.1:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.1.2:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.2.4:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.3.0:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.3.1:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.3.2:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:4.5.0:*:*:*:*:*:*:*
cpe:2.3:a:twiki:twiki:5.0.0:*:*:*:*:*:*:*

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