How severe is CVE-2018-20837?

CVE-2018-20837 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-20837 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20837?

CVE-2018-20837 affects Typesettercms Typesetter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20837?

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

When was CVE-2018-20837 published?

CVE-2018-20837 was published on 2019-05-09 and last updated on 2026-06-17.

CVE-2018-20837

CVE-2018-20837 is a medium-severity vulnerability in Typesettercms Typesetter with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Typesettercms Typesetter
Published: 2019-05-09
Last modified: 2026-06-17

Description

include/admin/Menu/Ajax.php in Typesetter 5.1 has index.php/Admin/Menu/Ajax?cmd=AddHidden title XSS.

Frequently asked questions

What is CVE-2018-20837?: include/admin/Menu/Ajax.php in Typesetter 5.1 has index.php/Admin/Menu/Ajax?cmd=AddHidden title XSS.
How severe is CVE-2018-20837?: CVE-2018-20837 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-20837 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20837?: CVE-2018-20837 affects Typesettercms Typesetter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20837?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20837 published?: CVE-2018-20837 was published on 2019-05-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:typesettercms:typesetter:5.1:*:*:*:*:*:*:*

More vulnerabilities in Typesettercms Typesetter

CVE-2022-25523 — High (CVSS 8.8): TypesetterCMS v5.1 was discovered to contain a Cross-Site Request Forgery (CSRF) which is exploited via a crafted POST…
CVE-2018-6889 — High (CVSS 8.8): An issue was discovered in Typesetter 5.1. It suffers from a Host header injection vulnerability, Using this attack, a…
CVE-2018-6888 — High (CVSS 8.0): An issue was discovered in Typesetter 5.1. The User Permissions page (aka Admin/Users) suffers from critical flaw of…
CVE-2020-25790 — High (CVSS 7.2): Typesetter CMS 5.x through 5.1 allows admins to upload and execute arbitrary PHP code via a .php file inside a ZIP…
CVE-2020-19511 — Medium (CVSS 6.1): Cross Site Scriptiong vulnerability in Typesetter 5.1 via the !1) className and !2) Description fields in…
CVE-2025-71166 — Medium (CVSS 5.4): Typesetter CMS versions up to and including 5.1 contain a reflected cross-site scripting (XSS) vulnerability in the…

All CVEs affecting Typesettercms Typesetter →

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

CVE-2025-49410 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Imran Emu TC…
CVE-2024-47875 — Critical (CVSS 10.0): DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMpurify was vulnerable to…
CVE-2024-6886 — Critical (CVSS 10.0): Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Gitea…
CVE-2023-45144 — Critical (CVSS 10.0): com.xwiki.identity-oauth:identity-oauth-ui is a package to aid in building identity and service providers based on…
CVE-2023-45138 — Critical (CVSS 10.0): Change Request is an pplication allowing users to request changes on a wiki without publishing the changes directly.…
CVE-2022-4361 — Critical (CVSS 10.0): Keycloak, an open-source identity and access management solution, has a cross-site scripting (XSS) vulnerability in the…

Browse all CWE-79 (Cross-site Scripting (XSS)) vulnerabilities →