How severe is CVE-2019-25103?

CVE-2019-25103 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2019-25103 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-2019-25103?

CVE-2019-25103 affects Khanacademy Simple-markdown. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-25103?

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

When was CVE-2019-25103 published?

CVE-2019-25103 was published on 2023-02-12 and last updated on 2026-06-17.

CVE-2019-25103

CVE-2019-25103 is a medium-severity vulnerability in Khanacademy Simple-markdown with a CVSS 3.x base score of 4.3. 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-1333.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Khanacademy Simple-markdown
Published: 2023-02-12
Last modified: 2026-06-17

Description

A vulnerability has been found in simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file simple-markdown.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. Upgrading to version 0.5.2 is able to address this issue. The patch is named 89797fef9abb4cab2fb76a335968266a92588816. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220639.

Frequently asked questions

What is CVE-2019-25103?: A vulnerability has been found in simple-markdown 0.5.1 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file simple-markdown.js. The manipulation leads to inefficient regular expression complexity. The attack can be launched remotely. Upgrading to version 0.5.2 is able to address this issue. The patch is named 89797fef9abb4cab2fb76a335968266a92588816. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-220639.
How severe is CVE-2019-25103?: CVE-2019-25103 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2019-25103 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-2019-25103?: CVE-2019-25103 affects Khanacademy Simple-markdown. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-25103?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-25103 published?: CVE-2019-25103 was published on 2023-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:khanacademy:simple-markdown:0.5.1:*:*:*:*:node.js:*:*

More vulnerabilities in Khanacademy Simple-markdown

CVE-2019-9844 — Medium (CVSS 6.1): simple-markdown.js in Khan Academy simple-markdown before 0.4.4 allows XSS via a data: or vbscript: URI.
CVE-2019-25102 — Medium (CVSS 4.3): A vulnerability, which was classified as problematic, was found in simple-markdown 0.6.0. Affected is an unknown…

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