CVE-2025-68645
Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability - [Actively Exploited]
Description
A Local File Inclusion (LFI) vulnerability exists in the Webmail Classic UI of Zimbra Collaboration (ZCS) 10.0 and 10.1 because of improper handling of user-supplied request parameters in the RestFilter servlet. An unauthenticated remote attacker can craft requests to the /h/rest endpoint to influence internal request dispatching, allowing inclusion of arbitrary files from the WebRoot directory.
INFO
Published Date :
Dec. 22, 2025, 6:16 p.m.
Last Modified :
Jan. 23, 2026, 6:39 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Synacor Zimbra Collaboration Suite (ZCS) contains a PHP remote file inclusion vulnerability that could allow for remote attackers to craft requests to the /h/rest endpoint to influence internal request dispatching, allowing inclusion of arbitrary files from the WebRoot directory.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
https://wiki.zimbra.com/wiki/Security_Center ; https://nvd.nist.gov/vuln/detail/CVE-2025-68645
Affected Products
The following products are affected by CVE-2025-68645
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update Zimbra Collaboration to the latest available version.
- Apply vendor-provided security patches immediately.
- Review and sanitize all user inputs.
- Restrict access to sensitive files.
Public PoC/Exploit Available at Github
CVE-2025-68645 has a 5 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-68645.
| URL | Resource |
|---|---|
| https://wiki.zimbra.com/wiki/Security_Center | Release Notes Vendor Advisory |
| https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy | Product |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645 | US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-68645 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-68645
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
CVE-2025-68645 - A Local File Inclusion (LFI) vulnerability in the Webmail Classic UI of Zimbra Collaboration
Academic proof-of-concept demonstrating CVE-2025-68645 for authorized security research.
zimbra cve-2025-68645 cve-2025-68645-poc cve-2025-68645-zimbra
Python
CVE-2025-68645
爬取secwiki和xuanwu.github.io/sec.today,分析安全信息站点、安全趋势、提取安全工作者账号(twitter,weixin,github等)
Python HTML
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-68645 vulnerability anywhere in the article.
-
TheCyberThrone
CISA KEV Alert: 5 Critical Vulnerabilities Added to Catalog
January 24, 2026As a cybersecurity analyst tracking threat intelligence, In a rapid-fire update, CISA added four flaws on January 22 and one on January 23, 2026, confirming active exploitation across ... Read more
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The Cyber Express
CISA Adds Five Enterprise Software Flaws to Known Exploited Vulnerabilities Catalog
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added five enterprise software flaws to its Known Exploited Vulnerabilities (KEV) Catalog in an 18-hour span. On January 22, CISA a ... Read more
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BleepingComputer
CISA confirms active exploitation of four enterprise software bugs
The Cybersecurity and Infrastructure Security Agency (CISA) in the U.S. warned of active exploitation of four vulnerabilities impacting enterprise software from Versa and Zimbra, the Vite frontend too ... Read more
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The Hacker News
CISA Updates KEV Catalog with Four Actively Exploited Software Vulnerabilities
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added four security flaws to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation in t ... Read more
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security.nl
VS meldt misbruik van lekken in Zimbra, Versa Concerto en Vite
Aanvallers maken actief misbruik van relatief nieuwe kwetsbaarheden in Zimbra, Versa Concerto en Vite, zo waarschuwt het Amerikaanse cyberagentschap CISA. Misbruik van deze lekken was nog niet bekend. ... Read more
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Daily CyberSecurity
CISA Adds 4 Critical Flaws to “Must-Patch” List as Exploits Surge
The Cybersecurity and Infrastructure Security Agency (CISA) has updated its Known Exploited Vulnerabilities (KEV) Catalog with four dangerous new entries, signaling that hackers are actively weaponizi ... Read more
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Daily CyberSecurity
Zimbra Under Siege: High-Severity LFI Vulnerability Exposes Internal Files to Unauthenticated Attackers
Administrators of the popular Zimbra Collaboration Suite (ZCS) are being urged to patch immediately after the discovery of two distinct security vulnerabilities. The most severe of the pair allows una ... Read more
The following table lists the changes that have been made to the
CVE-2025-68645 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Jan. 23, 2026
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.18 *cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.13 OR *cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.18 *cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.13 Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645 Types: US Government Resource -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 22, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-68645 -
Initial Analysis by [email protected]
Jan. 02, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.18 *cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.13 Added Reference Type MITRE: https://wiki.zimbra.com/wiki/Security_Center Types: Release Notes, Vendor Advisory Added Reference Type MITRE: https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy Types: Product -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Dec. 22, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Added CWE CWE-98 -
New CVE Received by [email protected]
Dec. 22, 2025
Action Type Old Value New Value Added Description A Local File Inclusion (LFI) vulnerability exists in the Webmail Classic UI of Zimbra Collaboration (ZCS) 10.0 and 10.1 because of improper handling of user-supplied request parameters in the RestFilter servlet. An unauthenticated remote attacker can craft requests to the /h/rest endpoint to influence internal request dispatching, allowing inclusion of arbitrary files from the WebRoot directory. Added Reference https://wiki.zimbra.com/wiki/Security_Center Added Reference https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy