CVE-2021-38351 json
OSD Subscribe <= 1.2.3 Reflected Cross-Site Scripting
published 2021-09-10 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24804
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
The OSD Subscribe WordPress plugin is vulnerable to Reflected Cross-Site Scripting via the osd_subscribe_message parameter found in the ~/options/osd_subscribe_options_subscribers.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 1.2.3.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/osd-subscribe/tags/1.2.3/options/osd_subscribe_options_subscribers.php#L86 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| 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 |
Affected products
- OSD Subscribe OSD Subscribe
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
plugins.trac.wordpress.org
/browser/osd-subscribe/tags/1.2.3/options/osd_subscribe_options_subscribers.php#L86
exploit, third-party-advisory
-
wordfence.com
/vulnerability-advisories/#CVE-2021-38351
third-party-advisory
Sources
- CVE List CVE-2021-38351
- NVD CVE-2021-38351
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