CVE-2020-11888

CVE-2020-11888 is a medium-severity vulnerability in Python-markdown2 Project Python-markdown2 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

Description

python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \w+ match succeeds. For example, an attack might use elementname@ or elementname- with an onclick attribute.

Frequently asked questions

What is CVE-2020-11888?
python-markdown2 through 2.3.8 allows XSS because element names are mishandled unless a \w+ match succeeds. For example, an attack might use elementname@ or elementname- with an onclick attribute.
How severe is CVE-2020-11888?
CVE-2020-11888 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-2020-11888 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11888?
CVE-2020-11888 affects Python-markdown2 Project Python-markdown2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11888?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-11888 published?
CVE-2020-11888 was published on 2020-04-20 and last updated on 2026-06-17.

References

Affected products (1)

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