CVE-2021-26799 json
Cross Site Scripting (XSS) vulnerability in admin/files/edit in Omeka Classic <=2.7 allows remote attackers to inject arbitrary web script…
published 2021-07-23 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13586
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
Cross Site Scripting (XSS) vulnerability in admin/files/edit in Omeka Classic <=2.7 allows remote attackers to inject arbitrary web script or HTML.
Patch / fix
Exploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/omeka/Omeka/commit/08bfdf470e234edb68e5307a2fef8c899d89256c referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/omeka/Omeka/issues/935 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/omeka/Omeka/commit/08bfdf470e234edb68e5307a2fef8c899d89256c
exploit, patch, third-party-advisory
-
github.com
/omeka/Omeka/issues/935
exploit, third-party-advisory
Sources
- CVE List CVE-2021-26799
- NVD CVE-2021-26799
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