Page generated: 09 Nov 2026, 05:14 UTC
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CVE-2025-53690

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0.

CVSS 9.0 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.7/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 9: +1.35
  • Fresh EPSS: 60.71%: +0.30

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 12 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

SOC Prime
Press · 23 Jan 2026, 08:00 · UAT-8837 Targets North American Critical Infrastructure - SOC Prime
The Hacker News
Press · 16 Jan 2026, 08:00 · China-Linked APT Exploited Sitecore Zero-Day in Critical Infrastructure Intrusion - The Hacker News
Industrial Cyber
Press · 16 Jan 2026, 08:00 · China-linked threat actor UAT-8837 exploits Sitecore vulnerability to target North American critical infrastructure - Industrial Cyber
Cisco Talos Blog
Press · 15 Jan 2026, 08:00 · UAT-8837 targets critical infrastructure sectors in North America - Cisco Talos Blog
CyberSecurityNews
Press · 12 Dec 2025, 08:00 · Top 20 Most Exploited Vulnerabilities of 2025: A Comprehensive Analysis - CyberSecurityNews
See all 12 source documents
Recorded Future
Press · 17 Oct 2025, 07:00 · September 2025 CVE Landscape - Recorded Future
CyberSecurityNews
Press · 20 Sep 2025, 07:00 · Top Zero-Day Vulnerabilities Exploited in the Wild in 2025 - CyberSecurityNews
The Hacker News
Press · 05 Sep 2025, 07:00 · CISA Orders Immediate Patch of Critical Sitecore Vulnerability Under Active Exploitation - The Hacker News
CCB Belgium
Press · 05 Sep 2025, 07:00 · Warning: Zero-Day Vulnerability in Sitecore Products (CVE-2025-53690), Fix Immediately! - CCB Belgium
Dark Reading
Press · 04 Sep 2025, 07:00 · Sitecore Zero-Day Sparks New Round of ViewState Threats - Dark Reading
Help Net Security
Press · 04 Sep 2025, 07:00 · Sitecore zero-day vulnerability exploited by attackers (CVE-2025-53690) - Help Net Security
Google Cloud
Press · 03 Sep 2025, 07:00 · ViewState Deserialization Zero-Day Vulnerability in Sitecore Products (CVE-2025-53690) - Google Cloud

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.7 (2026-11-02 15:13). The curve appears once the score changes.

Public exploit evidence

1

Public exploit entries / repo candidates

See 1 repos with metrics
RepositoryStarsForksLanguageUpdated
ErikLearningSec/CVE-2025-53690-POC80C#05 Nov 2025, 14:03
Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 9; EPSS 60.7%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
network access, no prior privileges, no user interaction, additional attack conditions.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:59:41.296531+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
03 Sep 2025, 07:00
Published
03 Sep 2025, 20:04
Added to the CISA KEV catalog
04 Sep 2025, 00:00
Latest press mention
23 Jan 2026, 08:00
Score calculated
05 Nov 2026, 13:59
PoCs on GitHub
1 repositories