Vulnerability · CVE-2025-53691
Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experie
Published Sep 3, 2025 · catalog updated Sep 3, 2025 · Cloudflare Experience Platform (XP)
Last checked Oct 25, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-53691. EPSS is 1.64%. Act only if a listed version of Cloudflare Experience Platform (XP) is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-53693 · Critical
- CVE-2025-53694 · High
- CVE-2015-10142 · Medium
- Severity
- High8.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 1.64%
- Remediation
- Vendor / distro source
- Affected products
- vendor Sitecore Experience Platform (XP) 10.0 ≤10.4
Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Sitecore Experience Platform (XP) 10.0 ≤10.410.0 ≤10.4
How to fix CVE-2025-53691
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in 10.0 ≤10.4
Advisory
Open the cloudflare_waf record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-53691. EPSS is 1.64%. Act only if a listed version of Cloudflare Experience Platform (XP) is installed.
Which versions are affected?
Compare what you have installed with Sitecore Experience Platform (XP) 10.0 ≤10.4 10.0 ≤10.4. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 1.64%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 3, 2025 · EUVD
Detected
Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.
Sep 3, 2025 · EUVD
Updated
Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.
Sources
- Cloudflare WAF rulesVendor advisoryCVE-2025-53691
CVE-2025-53691 is named in an emergency Cloudflare managed-rules release. The default action recorded for those rules is Block.
developers.cloudflare.com - CVE.orgVulnerability recordCVE-2025-53691
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-53691
30-day exploitation probability 1.64%
first.org - EUVDVulnerability recordEUVD-2025-26499
Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 t
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- Cloudflare WAF rulesOct 25, 2026
- FIRST EPSSOct 23, 2026
- CVE.orgOct 22, 2026
- EUVDOct 22, 2026