How severe is CVE-2011-4321?

CVE-2011-4321 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-4321 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-2011-4321?

CVE-2011-4321 primarily affects Joomla Joomla!. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-4321?

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

When was CVE-2011-4321 published?

CVE-2011-4321 was published on 2011-11-23 and last updated on 2026-06-16.

CVE-2011-4321

CVE-2011-4321 is a medium-severity vulnerability in Joomla Joomla! with a CVSS 2.0 base score of 5.0. 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Joomla Joomla!
Published: 2011-11-23
Last modified: 2026-06-16

Description

The password reset functionality in Joomla! 1.5.x through 1.5.24 uses weak random numbers, which makes it easier for remote attackers to change the passwords of arbitrary users via unspecified vectors.

Frequently asked questions

What is CVE-2011-4321?: The password reset functionality in Joomla! 1.5.x through 1.5.24 uses weak random numbers, which makes it easier for remote attackers to change the passwords of arbitrary users via unspecified vectors.
How severe is CVE-2011-4321?: CVE-2011-4321 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4321 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-2011-4321?: CVE-2011-4321 primarily affects Joomla Joomla!. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4321?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4321 published?: CVE-2011-4321 was published on 2011-11-23 and last updated on 2026-06-16.

References

Affected products (26)

cpe:2.3:a:joomla:joomla\!:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.2:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.3:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.4:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.5:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.6:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.7:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.8:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.9:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.10:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.11:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.12:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.13:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.14:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.15:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.15:rc:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.16:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.17:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.18:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.19:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.20:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.21:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.22:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.23:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:1.5.24:*:*:*:*:*:*:*

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