How severe is CVE-2019-15987?

CVE-2019-15987 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-15987 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-2019-15987?

CVE-2019-15987 primarily affects Cisco Webex Meetings Online. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-15987?

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

When was CVE-2019-15987 published?

CVE-2019-15987 was published on 2019-11-26 and last updated on 2026-06-17.

CVE-2019-15987

CVE-2019-15987 is a medium-severity vulnerability in Cisco Webex Meetings Online with a CVSS 3.x base score of 5.3. 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 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Webex Meetings Online
Published: 2019-11-26
Last modified: 2026-06-17

Description

A vulnerability in web interface of the Cisco Webex Event Center, Cisco Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training Center could allow an unauthenticated, remote attacker to guess account usernames. The vulnerability is due to missing CAPTCHA protection in certain URLs. An attacker could exploit this vulnerability by sending a crafted request to the web interface. A successful exploit could allow the attacker to know if a given username is valid and find the real name of the user.

Frequently asked questions

What is CVE-2019-15987?: A vulnerability in web interface of the Cisco Webex Event Center, Cisco Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training Center could allow an unauthenticated, remote attacker to guess account usernames. The vulnerability is due to missing CAPTCHA protection in certain URLs. An attacker could exploit this vulnerability by sending a crafted request to the web interface. A successful exploit could allow the attacker to know if a given username is valid and find the real name of the user.
How severe is CVE-2019-15987?: CVE-2019-15987 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-15987 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-2019-15987?: CVE-2019-15987 primarily affects Cisco Webex Meetings Online. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-15987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-15987 published?: CVE-2019-15987 was published on 2019-11-26 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-centers-infodis

Affected products (6)

cpe:2.3:a:cisco:webex_meetings_online:11.0.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meetings_server:4.0:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_event_center:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_meeting_center:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_support_center:-:*:*:*:*:*:*:*
cpe:2.3:a:cisco:webex_training_center:-:*:*:*:*:*:*:*

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