How severe is CVE-2026-50740?

CVE-2026-50740 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-50740 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-50740?

CVE-2026-50740 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50740?

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

Does CVE-2026-50740 have an EU (EUVD) identifier?

Yes. CVE-2026-50740 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39604.

When was CVE-2026-50740 published?

CVE-2026-50740 was published on 2026-06-26 and last updated on 2026-07-08.

CVE-2026-50740

CVE-2026-50740 is a medium-severity vulnerability in Revive-adserver Revive Adserver with a CVSS 3.x base score of 5.4. 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 5.4)
EPSS exploit prediction: 0% (13th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39604
Weakness: CWE-79
Affected product: Revive-adserver Revive Adserver
Published: 2026-06-26
Last modified: 2026-07-08

Description

A missing sanitisation vulnerability of user input in the zone-include.php script exists in Revive Adserver 6.0.7 and earlier. A low‑privileged user could exploit the refresh parameter of the iFrame invocation tag to perform reflected XSS attacks.

Frequently asked questions

What is CVE-2026-50740?: A missing sanitisation vulnerability of user input in the zone-include.php script exists in Revive Adserver 6.0.7 and earlier. A low‑privileged user could exploit the refresh parameter of the iFrame invocation tag to perform reflected XSS attacks.
How severe is CVE-2026-50740?: CVE-2026-50740 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-50740 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (13th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-50740?: CVE-2026-50740 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50740?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-50740 have an EU (EUVD) identifier?: Yes. CVE-2026-50740 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39604.
When was CVE-2026-50740 published?: CVE-2026-50740 was published on 2026-06-26 and last updated on 2026-07-08.

References

https://hackerone.com/reports/3780806

Affected products (1)

cpe:2.3:a:revive-adserver:revive_adserver:*:*:*:*:*:*:*:*

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