// For flags

CVE-2025-49763

Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

ESI plugin does not have the limit for maximum inclusion depth, and that allows excessive memory consumption if malicious instructions are inserted. Users can use a new setting for the plugin (--max-inclusion-depth) to limit it.
This issue affects Apache Traffic Server: from 10.0.0 through 10.0.5, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.

ESI plugin does not have the limit for maximum inclusion depth, and that allows excessive memory consumption if malicious instructions are inserted. Users can use a new setting for the plugin (--max-inclusion-depth) to limit it. This issue affects Apache Traffic Server: from 10.0.0 through 10.0.5, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.

*Credits: Yohann Sillam
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2025-06-09 CVE Reserved
  • 2025-06-19 CVE Published
  • 2025-06-20 CVE Updated
  • 2025-07-02 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
CAPEC
References (1)
URL Tag Source
URL Date SRC
URL Date SRC
URL Date SRC
https://lists.apache.org/thread/15t32nxbypqg1m2smp640vjx89o6v5f8 2025-06-19
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache Traffic Server
Search vendor "Apache Software Foundation" for product "Apache Traffic Server"
 >= 10.0.0 <= 10.0.5
Search vendor "Apache Software Foundation" for product "Apache Traffic Server" and version " >= 10.0.0 <= 10.0.5"
en
Affected
Apache Software Foundation
Search vendor "Apache Software Foundation"
 Apache Traffic Server
Search vendor "Apache Software Foundation" for product "Apache Traffic Server"
 >= 9.0.0 <= 9.2.10
Search vendor "Apache Software Foundation" for product "Apache Traffic Server" and version " >= 9.0.0 <= 9.2.10"
en
Affected