How severe is CVE-2021-22888?

CVE-2021-22888 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-22888 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22888?

CVE-2021-22888 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22888?

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

When was CVE-2021-22888 published?

CVE-2021-22888 was published on 2021-03-25 and last updated on 2026-06-17.

CVE-2021-22888

CVE-2021-22888 is a medium-severity vulnerability in Revive-adserver Revive Adserver with a CVSS 3.x base score of 6.1. Its EPSS exploit-prediction score of 20% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 20% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Revive-adserver Revive Adserver
Published: 2021-03-25
Last modified: 2026-06-17

Description

Revive Adserver before v5.2.0 is vulnerable to a reflected XSS vulnerability in the `status` parameter of campaign-zone-zones.php. An attacker could trick a user with access to the user interface of a Revive Adserver instance into clicking on a specifically crafted URL and execute injected JavaScript code.

Frequently asked questions

What is CVE-2021-22888?: Revive Adserver before v5.2.0 is vulnerable to a reflected XSS vulnerability in the `status` parameter of campaign-zone-zones.php. An attacker could trick a user with access to the user interface of a Revive Adserver instance into clicking on a specifically crafted URL and execute injected JavaScript code.
How severe is CVE-2021-22888?: CVE-2021-22888 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-22888 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 20% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22888?: CVE-2021-22888 affects Revive-adserver Revive Adserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22888?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-22888 published?: CVE-2021-22888 was published on 2021-03-25 and last updated on 2026-06-17.

References

Affected products (1)

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

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CVE-2017-5830 — Critical (CVSS 9.8): Revive Adserver before 4.0.1 allows remote attackers to execute arbitrary code via serialized data in the cookies…
CVE-2016-9470 — Critical (CVSS 9.0): Revive Adserver before 3.2.5 and 4.0.0 suffers from Reflected File Download. `www/delivery/asyncspc.php` was vulnerable…
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