CVE-2013-0209Movable Type Authentication Bypass
lib/MT/Upgrade.pm in mt-upgrade.cgi in Movable Type 4.2x and 4.3x through 4.38 does not require authentication for requests to database-migration functions, which allows remote attackers to conduct eval injection and SQL injection attacks via crafted parameters, as demonstrated…
Published Jan 22, 2013 · Updated Apr 28, 2026 · Also known as DEBIAN-CVE-2013-0209, DSA-2611-1
Key Facts
Patch immediately- CVE-2013-0209 is a high-severity vulnerability (CVSS 7.5 v2) affecting Movable Type (Sixapart), movabletype-opensource (debian).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 45% probability of exploitation in the next 30 days.
- Fixed versions are available, including movabletype-opensource 4.3.8+dfsg-0+squeeze3.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
45%
Higher than 98.7% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
52/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
2
Proof-of-concept links
In-the-wild evidence
2
Reports of active use
Advisories And Exploit References
Description
lib/MT/Upgrade.pm in mt-upgrade.cgi in Movable Type 4.2x and 4.3x through 4.38 does not require authentication for requests to database-migration functions, which allows remote attackers to conduct eval injection and SQL injection attacks via crafted parameters, as demonstrated by an eval injection attack against the core_drop_meta_for_table function, leading to execution of arbitrary Perl code.
Affected Products
34 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Movable TypeSixapart | 4.21, 4.22, 4.23, 4.24, 4.25, 4.26, 4.261, 4.27 | n/a |
| movabletype-opensourcedebian | See advisory | 4.3.8+dfsg-0+squeeze3 |
Patched Releases
movabletype-opensource
4.3.8+dfsg-0+squeeze3
Timeline
Publicly disclosed
Jan 22, 2013
Last updated
Apr 28, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- patchmovabletype.org · movable_type_438_patch.html
- exploitMSF movabletype_upgrade_exec.rb
- exploitExploitDB-24321
- exploitsec-1.com · blog
- exploitsec-1.com · movabletype_upgrade_exec.rb_.txt
FAQ
Common Questions.
lib/MT/Upgrade.pm in mt-upgrade.cgi in Movable Type 4.2x and 4.3x through 4.38 does not require authentication for requests to database-migration functions, which allows remote attackers to conduct eval injection and SQL injection attacks via crafted parameters, as demonstrated by an eval injection attack against the…
Affected: Movable Type (Sixapart) versions 4.21, 4.22, 4.23, 4.24, 4.25, 4.26, 4.261, 4.27; movabletype-opensource (debian). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including movabletype-opensource 4.3.8+dfsg-0+squeeze3.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2013-0209 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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