How severe is CVE-2020-3233?

CVE-2020-3233 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-3233 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3233?

CVE-2020-3233 affects Cisco Iox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3233?

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

When was CVE-2020-3233 published?

CVE-2020-3233 was published on 2020-06-03 and last updated on 2026-06-17.

CVE-2020-3233

CVE-2020-3233 is a medium-severity vulnerability in Cisco Iox with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cisco Iox
Published: 2020-06-03
Last modified: 2026-06-17

Description

A vulnerability in the web-based Local Manager interface of the Cisco IOx Application Framework could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based Local Manager interface of an affected device. The attacker must have valid Local Manager credentials. The vulnerability is due to insufficient validation of user-supplied input by the web-based Local Manager interface of the affected software. An attacker could exploit this vulnerability by injecting malicious code into a system settings tab. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information.

Frequently asked questions

What is CVE-2020-3233?: A vulnerability in the web-based Local Manager interface of the Cisco IOx Application Framework could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based Local Manager interface of an affected device. The attacker must have valid Local Manager credentials. The vulnerability is due to insufficient validation of user-supplied input by the web-based Local Manager interface of the affected software. An attacker could exploit this vulnerability by injecting malicious code into a system settings tab. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected web interface or allow the attacker to access sensitive browser-based information.
How severe is CVE-2020-3233?: CVE-2020-3233 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-3233 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3233?: CVE-2020-3233 affects Cisco Iox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3233?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3233 published?: CVE-2020-3233 was published on 2020-06-03 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxxss-wc6CqUws

Affected products (1)

cpe:2.3:a:cisco:iox:*:*:*:*:*:*:*:*

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