How severe is CVE-2013-3926?

CVE-2013-3926 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2013-3926 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3926?

CVE-2013-3926 affects Atlassian Crowd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-3926?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-3926 published?

CVE-2013-3926 was published on 2013-07-01 and last updated on 2026-06-16.

CVE-2013-3926

CVE-2013-3926 is a high-severity vulnerability in Atlassian Crowd with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Atlassian Crowd
Published: 2013-07-01
Last modified: 2026-06-16

Description

Atlassian Crowd 2.6.3 allows remote attackers to execute arbitrary commands via unspecified vectors related to a "symmetric backdoor." NOTE: as of 20130704, the vendor could not reproduce the issue, stating "We've been unable to substantiate the existence of [CVE-2013-3926]. The author of the article has not contacted Atlassian and has provided no detail, making it difficult to validate the claim... If we can confirm that there is a vulnerability, a patch will be issued.

Frequently asked questions

What is CVE-2013-3926?: Atlassian Crowd 2.6.3 allows remote attackers to execute arbitrary commands via unspecified vectors related to a "symmetric backdoor." NOTE: as of 20130704, the vendor could not reproduce the issue, stating "We've been unable to substantiate the existence of [CVE-2013-3926]. The author of the article has not contacted Atlassian and has provided no detail, making it difficult to validate the claim... If we can confirm that there is a vulnerability, a patch will be issued.
How severe is CVE-2013-3926?: CVE-2013-3926 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-3926 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3926?: CVE-2013-3926 affects Atlassian Crowd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-3926?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-3926 published?: CVE-2013-3926 was published on 2013-07-01 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:atlassian:crowd:2.6.3:*:*:*:*:*:*:*

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