How severe is CVE-2026-50742?

CVE-2026-50742 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-2026-50742 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.

What products are affected by CVE-2026-50742?

CVE-2026-50742 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-50742?

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

Does CVE-2026-50742 have an EU (EUVD) identifier?

Yes. CVE-2026-50742 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39603.

When was CVE-2026-50742 published?

CVE-2026-50742 was published on 2026-06-26 and last updated on 2026-06-29.

CVE-2026-50742

CVE-2026-50742 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% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39603
Weakness: CWE-79
Affected product: Revive-adserver Revive Adserver
Published: 2026-06-26
Last modified: 2026-06-29

Description

A stored XSS vulnerabilities exists in the `maintenance-acl-check.php` and `maintenance-banners-check.php` tools of Revive Adserver 6.0.7. The issue was caused by entity names being displayed without proper escaping when inconsistencies were detected. Whether the XSS payload is executed when an administrator uses the affected maintenance tools is not entirely under the attacker's control.

Frequently asked questions

What is CVE-2026-50742?: A stored XSS vulnerabilities exists in the `maintenance-acl-check.php` and `maintenance-banners-check.php` tools of Revive Adserver 6.0.7. The issue was caused by entity names being displayed without proper escaping when inconsistencies were detected. Whether the XSS payload is executed when an administrator uses the affected maintenance tools is not entirely under the attacker's control.
How severe is CVE-2026-50742?: CVE-2026-50742 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-2026-50742 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.
What products are affected by CVE-2026-50742?: CVE-2026-50742 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-50742?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-50742 have an EU (EUVD) identifier?: Yes. CVE-2026-50742 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39603.
When was CVE-2026-50742 published?: CVE-2026-50742 was published on 2026-06-26 and last updated on 2026-06-29.

References

https://hackerone.com/reports/3781311

Affected products (1)

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

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