How severe is CVE-2018-19621?

CVE-2018-19621 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-19621 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-19621?

CVE-2018-19621 affects Showdoc. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-19621?

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

When was CVE-2018-19621 published?

CVE-2018-19621 was published on 2018-11-28 and last updated on 2026-06-17.

CVE-2018-19621

CVE-2018-19621 is a medium-severity vulnerability in Showdoc with a CVSS 3.x base score of 6.5. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Showdoc
Published: 2018-11-28
Last modified: 2026-06-17

Description

server/index.php?s=/api/teamMember/save in ShowDoc 2.4.2 has a CSRF that can add members to a team.

Frequently asked questions

What is CVE-2018-19621?: server/index.php?s=/api/teamMember/save in ShowDoc 2.4.2 has a CSRF that can add members to a team.
How severe is CVE-2018-19621?: CVE-2018-19621 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-19621 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-19621?: CVE-2018-19621 affects Showdoc. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-19621?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-19621 published?: CVE-2018-19621 was published on 2018-11-28 and last updated on 2026-06-17.

References

https://github.com/CCCCCrash/POCs/tree/master/Web/showdoc/csrf

Affected products (1)

cpe:2.3:a:showdoc:showdoc:2.4.2:*:*:*:*:*:*:*

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CVE-2022-0409 — High (CVSS 7.8): Unrestricted Upload of File with Dangerous Type in Packagist showdoc/showdoc prior to 2.10.2.

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