How severe is CVE-2020-13763?

CVE-2020-13763 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2020-13763 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13763?

CVE-2020-13763 primarily affects Joomla Joomla!. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-13763?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-13763 published?

CVE-2020-13763 was published on 2020-06-02 and last updated on 2026-06-17.

CVE-2020-13763

CVE-2020-13763 is a high-severity vulnerability in Joomla Joomla! with a CVSS 3.x base score of 7.5. 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-281.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-281
Affected product: Joomla Joomla!
Published: 2020-06-02
Last modified: 2026-06-17

Description

In Joomla! before 3.9.19, the default settings of the global textfilter configuration do not block HTML inputs for Guest users.

Frequently asked questions

What is CVE-2020-13763?: In Joomla! before 3.9.19, the default settings of the global textfilter configuration do not block HTML inputs for Guest users.
How severe is CVE-2020-13763?: CVE-2020-13763 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2020-13763 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13763?: CVE-2020-13763 primarily affects Joomla Joomla!. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-13763?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-13763 published?: CVE-2020-13763 was published on 2020-06-02 and last updated on 2026-06-17.

References

https://developer.joomla.org/security-centre/814-20200602-core-inconsistent-default-textfilter-settings

Affected products (5)

cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:2.5.0:-:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:2.5.0:beta1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:2.5.0:beta2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:2.5.0:rc1:*:*:*:*:*:*

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