CVE-2018-5773
CVE-2018-5773 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
- Severity: Medium (CVSS 3.x base score 6.1)
- CVSS v2: 4.3
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: Python-markdown2 Project Python-markdown2
- Published:
- Last modified:
Description
An issue was discovered in markdown2 (aka python-markdown2) through 2.3.5. The safe_mode feature, which is supposed to sanitize user input against XSS, is flawed and does not escape the input properly. With a crafted payload, XSS can be triggered, as demonstrated by omitting the final '>' character from an IMG tag.
Frequently asked questions
- What is CVE-2018-5773?
- An issue was discovered in markdown2 (aka python-markdown2) through 2.3.5. The safe_mode feature, which is supposed to sanitize user input against XSS, is flawed and does not escape the input properly. With a crafted payload, XSS can be triggered, as demonstrated by omitting the final '>' character from an IMG tag.
- How severe is CVE-2018-5773?
- CVE-2018-5773 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-2018-5773 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-5773?
- CVE-2018-5773 affects Python-markdown2 Project Python-markdown2. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-5773?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-5773 published?
- CVE-2018-5773 was published on 2018-01-18 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:python-markdown2_project:python-markdown2:*:*:*:*:*:*:*:*
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