How severe is CVE-2021-26746?

CVE-2021-26746 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-2021-26746 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-26746?

CVE-2021-26746 affects Chamilo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-26746?

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

When was CVE-2021-26746 published?

CVE-2021-26746 was published on 2021-02-19 and last updated on 2026-06-17.

CVE-2021-26746

CVE-2021-26746 is a medium-severity vulnerability in Chamilo 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% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Chamilo
Published: 2021-02-19
Last modified: 2026-06-17

Description

Chamilo 1.11.14 allows XSS via a main/calendar/agenda_list.php?type= URI.

Frequently asked questions

What is CVE-2021-26746?: Chamilo 1.11.14 allows XSS via a main/calendar/agenda_list.php?type= URI.
How severe is CVE-2021-26746?: CVE-2021-26746 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-2021-26746 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-26746?: CVE-2021-26746 affects Chamilo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-26746?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-26746 published?: CVE-2021-26746 was published on 2021-02-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:chamilo:chamilo:1.11.14:*:*:*:*:*:*:*

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