How severe is CVE-2026-13504?

CVE-2026-13504 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-13504 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-13504?

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

When was CVE-2026-13504 published?

CVE-2026-13504 was published on 2026-06-28 and last updated on 2026-06-30.

CVE-2026-13504

CVE-2026-13504 is a low-severity vulnerability with a CVSS 3.x base score of 3.5. 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-79.

Key facts

Severity: Low (CVSS 3.x base score 3.5)
CVSS v2: 4.0
CVSS v4: 2.0
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Published: 2026-06-28
Last modified: 2026-06-30

Description

A vulnerability has been found in code-projects Project Management System 1.0. This vulnerability affects unknown code of the file /mail.php of the component Mail Compose Page. Such manipulation leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2026-13504?: A vulnerability has been found in code-projects Project Management System 1.0. This vulnerability affects unknown code of the file /mail.php of the component Mail Compose Page. Such manipulation leads to cross site scripting. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.
How severe is CVE-2026-13504?: CVE-2026-13504 has a CVSS 3.x base score of 3.5, rated low severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-13504 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-13504?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-13504 published?: CVE-2026-13504 was published on 2026-06-28 and last updated on 2026-06-30.

References

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

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