How severe is CVE-2011-4555?

CVE-2011-4555 has a CVSS 2.0 base score of 4.0, rated medium severity.

Is CVE-2011-4555 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-4555?

CVE-2011-4555 primarily affects Oneclickorgs One Click Orgs. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4555?

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

When was CVE-2011-4555 published?

CVE-2011-4555 was published on 2011-12-06 and last updated on 2026-06-16.

CVE-2011-4555

CVE-2011-4555 is a medium-severity vulnerability in Oneclickorgs One Click Orgs with a CVSS 2.0 base score of 4.0. 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-255.

Key facts

Severity: Medium (CVSS 2.0 base score 4.0)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-255
Affected product: Oneclickorgs One Click Orgs
Published: 2011-12-06
Last modified: 2026-06-16

Description

One Click Orgs before 1.2.3 does not require unique e-mail addresses for user accounts, which allows remote authenticated users to cause a denial of service (login disruption) or spoof votes or comments by selecting a conflicting e-mail address.

Frequently asked questions

What is CVE-2011-4555?: One Click Orgs before 1.2.3 does not require unique e-mail addresses for user accounts, which allows remote authenticated users to cause a denial of service (login disruption) or spoof votes or comments by selecting a conflicting e-mail address.
How severe is CVE-2011-4555?: CVE-2011-4555 has a CVSS 2.0 base score of 4.0, rated medium severity.
Is CVE-2011-4555 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4555?: CVE-2011-4555 primarily affects Oneclickorgs One Click Orgs. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4555?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4555 published?: CVE-2011-4555 was published on 2011-12-06 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:oneclickorgs:one_click_orgs:*:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oneclickorgs:one_click_orgs:1.2.1:*:*:*:*:*:*:*

More vulnerabilities in Oneclickorgs One Click Orgs

CVE-2011-4677 — High (CVSS 7.5): One Click Orgs before 1.2.3 does not have an off autocomplete attribute for authentication fields, which makes it…
CVE-2011-4553 — Medium (CVSS 5.8): Multiple open redirect vulnerabilities in One Click Orgs before 1.2.3 allow (1) remote attackers to redirect users to…
CVE-2011-4554 — Medium (CVSS 5.5): One Click Orgs before 1.2.3 allows remote authenticated users to trigger crafted SMTP traffic via (1) " (double quote)…
CVE-2011-4678 — Medium (CVSS 5.0): The password reset feature in One Click Orgs before 1.2.3 generates different error messages for failed reset attempts…
CVE-2011-4552 — Medium (CVSS 4.3): Multiple cross-site scripting (XSS) vulnerabilities in One Click Orgs before 1.2.3 allow remote attackers to inject…

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