How severe is CVE-2021-26722?

CVE-2021-26722 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-2021-26722 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26722?

CVE-2021-26722 affects Linkedin Oncall. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26722?

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

When was CVE-2021-26722 published?

CVE-2021-26722 was published on 2021-02-05 and last updated on 2026-06-17.

CVE-2021-26722

CVE-2021-26722 is a medium-severity vulnerability in Linkedin Oncall 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: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Linkedin Oncall
Published: 2021-02-05
Last modified: 2026-06-17

Description

LinkedIn Oncall through 1.4.0 allows reflected XSS via /query because of mishandling of the "No results found for" message in the search bar.

Frequently asked questions

What is CVE-2021-26722?: LinkedIn Oncall through 1.4.0 allows reflected XSS via /query because of mishandling of the "No results found for" message in the search bar.
How severe is CVE-2021-26722?: CVE-2021-26722 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-2021-26722 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26722?: CVE-2021-26722 affects Linkedin Oncall. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26722?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26722 published?: CVE-2021-26722 was published on 2021-02-05 and last updated on 2026-06-17.

References

https://github.com/linkedin/oncall/issues/341

Affected products (1)

cpe:2.3:a:linkedin:oncall:*:*:*:*:*:*:*:*

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