How severe is CVE-2018-19922?

CVE-2018-19922 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-19922 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19922?

CVE-2018-19922 affects Actiontec C1000a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19922?

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

When was CVE-2018-19922 published?

CVE-2018-19922 was published on 2018-12-06 and last updated on 2026-06-17.

CVE-2018-19922

CVE-2018-19922 is a medium-severity vulnerability in Actiontec C1000a Firmware with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Actiontec C1000a Firmware
Published: 2018-12-06
Last modified: 2026-06-17

Description

Persistent Cross-Site Scripting (XSS) in the advancedsetup_websiteblocking.html Website Blocking page of the Actiontec C1000A router with firmware through CAC004-31.30L.95 allows a remote attacker to inject arbitrary HTML into the Website Blocking page by inserting arbitrary HTML into the 'TodUrlAdd' URL parameter in a /urlfilter.cmd POST request.

Frequently asked questions

What is CVE-2018-19922?: Persistent Cross-Site Scripting (XSS) in the advancedsetup_websiteblocking.html Website Blocking page of the Actiontec C1000A router with firmware through CAC004-31.30L.95 allows a remote attacker to inject arbitrary HTML into the Website Blocking page by inserting arbitrary HTML into the 'TodUrlAdd' URL parameter in a /urlfilter.cmd POST request.
How severe is CVE-2018-19922?: CVE-2018-19922 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-19922 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19922?: CVE-2018-19922 affects Actiontec C1000a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19922?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-19922 published?: CVE-2018-19922 was published on 2018-12-06 and last updated on 2026-06-17.

References

https://github.com/logern5/c1000a_xss/blob/master/README.md

Affected products (1)

cpe:2.3:o:actiontec:c1000a_firmware:*:*:*:*:*:*:*:*

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