CVE-2025-24989: Microsoft Power Pages Improper Access Control Vulnerability

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• Yes, if you run Microsoft Power Pages. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-02-21, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-03-14; treat that as the outer limit, not the target.
• EPSS 1.6%, percentile 76: FIRST’s model estimates a 1.6% chance of exploitation activity in the next 30 days, higher than 76% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

What it is

An improper access control vulnerability in Power Pages allows an unauthorized attacker to elevate privileges over a network potentially bypassing the user registration control. This vulnerability has already been mitigated in the service and all affected customers have been notified. This update addressed the registration control bypass. Affected customers have been given instructions on reviewing their sites for potential exploitation and clean up methods. If you've not been notified this vulnerability does not affect you.

CISA’s summary

Microsoft Power Pages contains an improper access control vulnerability that allows an unauthorized attacker to elevate privileges over a network potentially bypassing the user registration control.

Weakness type: CWE-284.

Product: Microsoft Power Pages · Assigned by: microsoft · Published: 2025-02-19

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: none
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: added 2025-02-21; federal due date 2025-03-14. Known ransomware use: Unknown.
• CISA required action: Apply mitigations per vendor instructions, follow BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
• CISA SSVC assessment: exploitation active, automatable no, technical impact total.
• FIRST EPSS (model of 2026-10-21): 1.62% probability of exploitation activity in the next 30 days; percentile 76.

Timeline

• 2025-02-19 — CVE record published by microsoft
• 2025-02-21 — Added to CISA’s Known Exploited Vulnerabilities catalog
• 2025-03-14 — CISA remediation deadline for US federal agencies
• 2026-02-13 — CVE record last updated

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vendor and project advisories, patches

1. Microsoft Power Pages Elevation of Privilege Vulnerability msrc.microsoft.com
2. Listed in CISA KEV notes (msrc.microsoft.com) msrc.microsoft.com

Vulnerability records

1. CVE.org record CVE-2025-24989 cve.org
2. NVD entry CVE-2025-24989 nvd.nist.gov

Government

1. CISA Known Exploited Vulnerabilities catalog entry cisa.gov

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