Share/IncomingWizard.htm in SolarWinds Serv-U before 15.2.3 mishandles the user-supplied SenderEmail parameter, aka "Share URL XSS."

published 2021-05-11 5y ago modified 2026-06-17 4mo ago also EUVD-2021-19444

cvss: 5.4; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.7%; EPSS 1.7% chance of exploitation in 30 days, percentile 77%
public exploits: 0; none known

Patch / fix

fixed in 1

solarwinds serv-u 15.2.3

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Exploit prediction

1.72% chance of exploitation in the next 30 days, higher than 77% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

trustwave.com https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/solarwinds-serv-u-1523-share-url-xss-cve-2021-32604/ referenced PoC, tagged "exploit" by a source, unverified
trustwave.com https://www.trustwave.com/en-us/resources/security-resources/security-advisories/?fid=29000 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	3.5	AV:N/AC:M/Au:S/C:N/I:P/A:N

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

trustwave.com /en-us/resources/blogs/spiderlabs-blog/solarwinds-serv-u-1523-share-url-xss-cve-2021-32604/
exploit, third-party-advisory
trustwave.com /en-us/resources/security-resources/security-advisories/?fid=29000
exploit, third-party-advisory
documentation.solarwinds.com /en/success_center/servu/content/release_notes/servu_15-2-3_release_notes.htm
release-notes, vendor-advisory

Sources

CVE List CVE-2021-32604
NVD CVE-2021-32604

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.