CVE-2026-1813 bolo-blog bolo-solo FreeMarker Template PicUploadProcessor.java unrestricted upload
Remote attackers can upload malicious files via the PicUploadProcessor, potentially leading to code execution on the bolo-solo blog server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1813?
CVE-2026-1813 is a medium-severity vulnerability in bolo-blog bolo-solo, published on 3 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-1813?
It affects 1 product.
Products include Adlered Bolo-Solo.
How do I fix CVE-2026-1813?
No fix has been published for CVE-2026-1813 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1813 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1813 exists.
Other vulnerabilities in bolo-blog bolo-solo
- CVE-2023-41009 File upload in n/a
- CVE-2026-1810 bolo-blog bolo-solo ZIP File BackupService.java unpackFilteredZip path traversal
- CVE-2026-1811 bolo-blog bolo-solo Filename BackupService.java importFromMarkdown path traversal
- CVE-2026-1812 bolo-blog bolo-solo Filename BackupService.java importFromCnblogs path traversal
- CVE-2026-1691 bolo-solo SnakeYAML BackupService.java importMarkdownsSync deserialization
Sources
Also known as GHSA-2hmq-qjp7-8j88.