Session data theft via unescaped URL parameter
Published Jul 31, 2023 · Updated Oct 30, 2025
Reflected XSS in Zimbra Collaboration 8 before 8.8.15 Patch 41 allows remote attackers to run scripts in the Classic Web Client. The /m/momoveto template writes the URL's st parameter into a hidden input value without XML escaping, allowing injected markup to execute. A logged-in victim must click a crafted link; observed attacks stole mail, credentials, or authentication tokens.
Summary
What happened
Reflected XSS in Zimbra Collaboration 8 before 8.8.15 Patch 41 allows remote attackers to run scripts in the Classic Web Client. The /m/momoveto template writes the URL's st parameter into a hidden input value without XML escaping, allowing injected markup to execute. A logged-in victim must click a crafted link; observed attacks stole mail, credentials, or authentication tokens.
The record
- CVE
- CVE-2023-37580
- Published
- Jul 31, 2023
- Updated
- Oct 30, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-79, T1539, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 29, 2023Exploitation reportedCampaign 1 email-stealing framework
- Jul 11, 2023Exploitation reportedWinter Vivern government targeting
- Jul 20, 2023Exploitation reportedCampaign 3 credential phishing
- Jul 27, 2023Exploitation reportedCISA Known Exploited Vulnerabilities listing
- Jul 31, 2023CVE publishedPublication date reported by the CVE source.
- Aug 25, 2023Exploitation reportedCampaign 4 authentication-token theft
- Oct 30, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Google TAG observed exploit URLweaponized · observed in use
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Winter Vivern government targetingthreat actor
- Campaign 3 credential phishingreported exploitation
- CISA Known Exploited Vulnerabilities listingknown exploited catalog
- Campaign 1 email-stealing frameworkreported exploitation
- Campaign 4 authentication-token theftreported exploitation
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo