How severe is CVE-2025-55123?

CVE-2025-55123 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-2025-55123 being actively exploited?

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

What products are affected by CVE-2025-55123?

CVE-2025-55123 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-55123?

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

Does CVE-2025-55123 have an EU (EUVD) identifier?

Yes. CVE-2025-55123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198349.

When was CVE-2025-55123 published?

CVE-2025-55123 was published on 2025-11-20 and last updated on 2026-06-17.

CVE-2025-55123

CVE-2025-55123 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% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-198349
Weakness: CWE-79
Affected product: Revive-adserver Revive Adserver
Published: 2025-11-20
Last modified: 2026-06-17

Description

Improper neutralization of input in Revive Adserver 5.5.2 and 6.0.1 and earlier versions causes manager accounts to be able to craft XSS attacks to their own advertiser users.

Frequently asked questions

What is CVE-2025-55123?: Improper neutralization of input in Revive Adserver 5.5.2 and 6.0.1 and earlier versions causes manager accounts to be able to craft XSS attacks to their own advertiser users.
How severe is CVE-2025-55123?: CVE-2025-55123 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-2025-55123 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55123?: CVE-2025-55123 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-55123?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-55123 have an EU (EUVD) identifier?: Yes. CVE-2025-55123 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-198349.
When was CVE-2025-55123 published?: CVE-2025-55123 was published on 2025-11-20 and last updated on 2026-06-17.

References

https://hackerone.com/reports/3404968

Affected products (1)

cpe:2.3:a:revive-adserver:revive_adserver:6.0.0:-:*:*:*:*:*:*

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