How severe is CVE-2026-13536?

CVE-2026-13536 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2026-13536 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-13536?

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

When was CVE-2026-13536 published?

CVE-2026-13536 was published on 2026-06-29 and last updated on 2026-06-30.

CVE-2026-13536

CVE-2026-13536 is a medium-severity vulnerability 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 5.0
CVSS v4: 2.1
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Published: 2026-06-29
Last modified: 2026-06-30

Description

A vulnerability has been found in GotoHTTP up to 10.2. This issue affects some unknown processing of the file /reg.12x. The manipulation of the argument sn leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor explains: "We immediately removed unnecessary parameter echo from source code. However the URL in the issue description will never be used in browser nor exposed to user, so it will not bring secure problem in fact. So we don't upgrade server right now, it will be included in next version together with other features."

Frequently asked questions

What is CVE-2026-13536?: A vulnerability has been found in GotoHTTP up to 10.2. This issue affects some unknown processing of the file /reg.12x. The manipulation of the argument sn leads to cross site scripting. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The vendor explains: "We immediately removed unnecessary parameter echo from source code. However the URL in the issue description will never be used in browser nor exposed to user, so it will not bring secure problem in fact. So we don't upgrade server right now, it will be included in next version together with other features."
How severe is CVE-2026-13536?: CVE-2026-13536 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2026-13536 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-13536?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-13536 published?: CVE-2026-13536 was published on 2026-06-29 and last updated on 2026-06-30.

References

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