How severe is CVE-2011-2978?

CVE-2011-2978 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2011-2978 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-2978?

CVE-2011-2978 primarily affects Mozilla Bugzilla. In total, 129 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-2978?

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

When was CVE-2011-2978 published?

CVE-2011-2978 was published on 2011-08-09 and last updated on 2026-06-16.

CVE-2011-2978

CVE-2011-2978 is a medium-severity vulnerability in Mozilla Bugzilla 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Mozilla Bugzilla
Published: 2011-08-09
Last modified: 2026-06-16

Description

Bugzilla 2.16rc1 through 2.22.7, 3.0.x through 3.3.x, 3.4.x before 3.4.12, 3.5.x, 3.6.x before 3.6.6, 3.7.x, 4.0.x before 4.0.2, and 4.1.x before 4.1.3 does not prevent changes to the confirmation e-mail address (aka old_email field) for e-mail change notifications, which makes it easier for remote attackers to perform arbitrary address changes by leveraging an unattended workstation.

Frequently asked questions

What is CVE-2011-2978?: Bugzilla 2.16rc1 through 2.22.7, 3.0.x through 3.3.x, 3.4.x before 3.4.12, 3.5.x, 3.6.x before 3.6.6, 3.7.x, 4.0.x before 4.0.2, and 4.1.x before 4.1.3 does not prevent changes to the confirmation e-mail address (aka old_email field) for e-mail change notifications, which makes it easier for remote attackers to perform arbitrary address changes by leveraging an unattended workstation.
How severe is CVE-2011-2978?: CVE-2011-2978 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-2978 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-2978?: CVE-2011-2978 primarily affects Mozilla Bugzilla. In total, 129 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-2978?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-2978 published?: CVE-2011-2978 was published on 2011-08-09 and last updated on 2026-06-16.

References

Affected products (129)

cpe:2.3:a:mozilla:bugzilla:2.16:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16:rc1:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.16.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.17.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18:rc1:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18:rc2:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18:rc3:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.18.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.19:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.19.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.19.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.19.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20:rc1:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20:rc2:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:bugzilla:2.20.3:*:*:*:*:*:*:*

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