How severe is CVE-2023-31803?

CVE-2023-31803 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-2023-31803 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-31803?

CVE-2023-31803 affects Chamilo Chamilo Lms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-31803?

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

When was CVE-2023-31803 published?

CVE-2023-31803 was published on 2023-05-09 and last updated on 2026-07-05.

CVE-2023-31803

CVE-2023-31803 is a medium-severity vulnerability in Chamilo Chamilo Lms 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)
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Chamilo Chamilo Lms
Published: 2023-05-09
Last modified: 2026-07-05

Description

Cross Site Scripting vulnerability found in Chamilo Lms v.1.11.18 allows a local attacker to execute arbitrary code via the resource sequencing parameters.

Frequently asked questions

What is CVE-2023-31803?: Cross Site Scripting vulnerability found in Chamilo Lms v.1.11.18 allows a local attacker to execute arbitrary code via the resource sequencing parameters.
How severe is CVE-2023-31803?: CVE-2023-31803 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-2023-31803 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-31803?: CVE-2023-31803 affects Chamilo Chamilo Lms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-31803?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-31803 published?: CVE-2023-31803 was published on 2023-05-09 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:chamilo:chamilo_lms:1.11.18:*:*:*:*:*:*:*

More vulnerabilities in Chamilo Chamilo Lms

CVE-2026-33698 — Critical (CVSS 9.8): Chamilo LMS is a learning management system. Prior to 1.11.38, a chained attack can enable otherwise-blocked PHP code…
CVE-2026-28430 — Critical (CVSS 9.8): Chamilo LMS is a learning management system. Prior to version 1.11.34, there is an unauthenticated SQL injection…
CVE-2025-52998 — Critical (CVSS 9.8): Chamilo is a learning management system. Prior to version 1.11.30, in the application, deserialization of data is…
CVE-2025-50192 — Critical (CVSS 9.8): Chamilo is a learning management system. Prior to version 1.11.30, there is a time-based SQL Injection in found in…
CVE-2025-50190 — Critical (CVSS 9.8): Chamilo is a learning management system. Prior to version 1.11.30, there is an error-based SQL Injection via the GET…
CVE-2025-50187 — Critical (CVSS 9.8): Chamilo is a learning management system. Prior to version 1.11.28, parameter from SOAP request is evaluated without…

All CVEs affecting Chamilo Chamilo Lms →

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 →