How severe is CVE-2011-2771?

CVE-2011-2771 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2011-2771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2771?

CVE-2011-2771 primarily affects Mahara. In total, 72 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2771?

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

When was CVE-2011-2771 published?

CVE-2011-2771 was published on 2011-11-15 and last updated on 2026-06-16.

CVE-2011-2771

CVE-2011-2771 is a medium-severity vulnerability in Mahara 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: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mahara
Published: 2011-11-15
Last modified: 2026-06-16

Description

Multiple cross-site scripting (XSS) vulnerabilities in Mahara before 1.4.1 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) URI attributes and (2) the External Feed component, as demonstrated by the guid element in an RSS feed.

Frequently asked questions

What is CVE-2011-2771?: Multiple cross-site scripting (XSS) vulnerabilities in Mahara before 1.4.1 allow remote attackers to inject arbitrary web script or HTML via vectors related to (1) URI attributes and (2) the External Feed component, as demonstrated by the guid element in an RSS feed.
How severe is CVE-2011-2771?: CVE-2011-2771 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2011-2771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2771?: CVE-2011-2771 primarily affects Mahara. In total, 72 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2771?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2771 published?: CVE-2011-2771 was published on 2011-11-15 and last updated on 2026-06-16.

References

Affected products (72)

cpe:2.3:a:mahara:mahara:*:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:0.9.0:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:0.9.1:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:0.9.2:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.9:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.10:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.11:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.12:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.13:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.14:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.0.15:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:alpha3:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:beta1:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:beta2:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:beta3:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:beta4:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:mahara:mahara:1.1.9:*:*:*:*:*:*:*

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