CVE-2023-45878
CriticalExploitedPublic exploitGibbonEdu Gibbon version 25.0.1 and before allows Arbitrary File Write because rubrics_visualise_saveAjax.phps does not require authentication.
Published Nov 14, 2023 · Updated Aug 12, 2026
Key Facts
Patch immediately- CVE-2023-45878 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Gibbon (Gibbonedu).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since May 19, 2025. Public exploit code is available.
- EPSS estimates a 63% probability of exploitation in the next 30 days.
- Fixed versions are available, including Gibbon <=25.0.01, Gibbon 25.0.01.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
63%
Higher than 99.1% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-45878 brief as a PDF
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Description
GibbonEdu Gibbon version 25.0.1 and before allows Arbitrary File Write because rubrics_visualise_saveAjax.phps does not require authentication. The endpoint accepts the img, path, and gibbonPersonID parameters. The img parameter is expected to be a base64 encoded image. If the path parameter is set, the defined path is used as the destination folder, concatenated with the absolute path of the installation directory. The content of the img parameter is base64 decoded and written to the defined file path. This allows creation of PHP files that permit Remote Code Execution (unauthenticated).
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 19, 2025 | n/a | Not reported |
| CIRCL KEV | May 19, 2025 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| GibbonGibbonedu | See advisory | 25.0.01 |
Patched Releases
Gibbon
<=25.0.01
Timeline
Publicly disclosed
Nov 14, 2023
Added to Industry KEV feed
May 19, 2025
Added to CIRCL KEV
May 19, 2025
Last updated
Aug 12, 2026
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/45xxx/CVE-2023-45878.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-45878
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
GibbonEdu Gibbon version 25.0.1 and before allows Arbitrary File Write because rubrics_visualise_saveAjax.phps does not require authentication.
Affected: Gibbon (Gibbonedu). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since May 19, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Gibbon <=25.0.01, Gibbon 25.0.01.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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