How severe is CVE-2013-3977?

CVE-2013-3977 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-3977 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3977?

CVE-2013-3977 primarily affects Ibm Sametime. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-3977?

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

When was CVE-2013-3977 published?

CVE-2013-3977 was published on 2014-05-26 and last updated on 2026-06-16.

CVE-2013-3977

CVE-2013-3977 is a medium-severity vulnerability in Ibm Sametime 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-287.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Ibm Sametime
Published: 2014-05-26
Last modified: 2026-06-16

Description

The Meeting Server in IBM Sametime 8.x through 8.5.2.1 and 9.x through 9.0.0.1 allows remote attackers to determine which meeting rooms are owned by a user by leveraging knowledge of valid user names.

Frequently asked questions

What is CVE-2013-3977?: The Meeting Server in IBM Sametime 8.x through 8.5.2.1 and 9.x through 9.0.0.1 allows remote attackers to determine which meeting rooms are owned by a user by leveraging knowledge of valid user names.
How severe is CVE-2013-3977?: CVE-2013-3977 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-3977 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3977?: CVE-2013-3977 primarily affects Ibm Sametime. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-3977?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-3977 published?: CVE-2013-3977 was published on 2014-05-26 and last updated on 2026-06-16.

References

Affected products (12)

cpe:2.3:a:ibm:sametime:8.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.0.1.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.0.2.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.5.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.5.1.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.5.2.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:8.5.2.1:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:9.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:sametime:9.0.0.1:*:*:*:*:*:*:*

More vulnerabilities in Ibm Sametime

CVE-2016-2972 — High (CVSS 7.8): IBM Sametime Meeting Server 8.5.2 and 9.0 could store credentials of the Sametime Meetings user in the local cache of…
CVE-2013-6742 — High (CVSS 7.5): The Meeting Server in IBM Sametime 8.5.2 through 8.5.2.1 and 9.x through 9.0.0.1 do not have an off autocomplete…
CVE-2013-3983 — High (CVSS 7.5): The Meeting Server in IBM Sametime 8.5.2 through 8.5.2.1 and 9.x through 9.0.0.1 does not validate URLs in Cookie…
CVE-2013-3988 — Medium (CVSS 6.8): The Meeting Server in IBM Sametime 8.5.2 through 8.5.2.1 and 9.x through 9.0.0.1 allows remote attackers to conduct…
CVE-2016-2965 — Medium (CVSS 6.5): IBM Sametime Meeting Server 8.5.2 and 9.0 is vulnerable to cross-site request forgery, caused by improper validation of…
CVE-2016-0356 — Medium (CVSS 6.5): IBM Sametime Enterprise Meeting Server 8.5.2 and 9.0 could allow an authenticated user that has been invited to a…

All CVEs affecting Ibm Sametime →

Other CWE-287 (Improper Authentication) vulnerabilities

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CVE-2026-19977 — Critical (CVSS 10.0): A vulnerability was detected in EFM ipTIME A3004T 14.19.0. The affected element is the function…
CVE-2026-59500 — Critical (CVSS 10.0): CWE-287: Improper Authentication
CVE-2024-27253 — Critical (CVSS 10.0): IBM DOORS Next 7.0.3 through 7.0.3 Interim Fix 018 could allow an authenticated user to bypass security logic to…
CVE-2026-56162 — Critical (CVSS 10.0): Improper authentication in Azure SQL Database allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-62825 — Critical (CVSS 10.0): Improper authentication in Azure Key Vault allows an unauthorized attacker to elevate privileges over a network.

Browse all CWE-287 (Improper Authentication) vulnerabilities →