How severe is CVE-2020-13761?

CVE-2020-13761 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-2020-13761 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13761?

CVE-2020-13761 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-2020-13761?

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

When was CVE-2020-13761 published?

CVE-2020-13761 was published on 2020-06-02 and last updated on 2026-06-17.

CVE-2020-13761

CVE-2020-13761 is a medium-severity vulnerability in Joomla Joomla! 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% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Joomla Joomla!
Published: 2020-06-02
Last modified: 2026-06-17

Description

In Joomla! before 3.9.19, lack of input validation in the heading tag option of the "Articles - Newsflash" and "Articles - Categories" modules allows XSS.

Frequently asked questions

What is CVE-2020-13761?: In Joomla! before 3.9.19, lack of input validation in the heading tag option of the "Articles - Newsflash" and "Articles - Categories" modules allows XSS.
How severe is CVE-2020-13761?: CVE-2020-13761 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-2020-13761 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13761?: CVE-2020-13761 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-2020-13761?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-13761 published?: CVE-2020-13761 was published on 2020-06-02 and last updated on 2026-06-17.

References

https://developer.joomla.org/security-centre/813-20200601-core-xss-in-modules-heading-tag-option

Affected products (5)

cpe:2.3:a:joomla:joomla\!:*:*:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.0.0:-:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.0.0:alpha1:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.0.0:alpha2:*:*:*:*:*:*
cpe:2.3:a:joomla:joomla\!:3.0.0:beta1:*:*:*:*:*:*

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