Critical severity · published Feb 3, 2026
CVE-2026-1813
bolo-blog bolo-solo FreeMarker Template PicUploadProcessor.java unrestricted upload
9.8
CVSS
0.4%
EPSS
No
On KEV
Description
A vulnerability was found in bolo-blog bolo-solo up to 2.6.4. Affected is an unknown function of the file src/main/java/org/b3log/solo/bolo/pic/PicUploadProcessor.java of the component FreeMarker Template Handler. The manipulation of the argument File results in unrestricted upload. It is possible to launch the attack remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 31% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BO
bolo-solo · bolo-blog
2.6.0; 2.6.1; 2.6.2; 2.6.3; 2.6.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1813
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1813
Product
https://github.com/bolo-blog/bolo-solo/
Exploit
https://github.com/bolo-blog/bolo-solo/issues/329
Permissions Required
https://vuldb.com/?ctiid.343981
Third Party Advisory
https://vuldb.com/?id.343981
Third Party Advisory
https://vuldb.com/?submit.743402
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